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{{short description|Legal requirements governing air pollutants released into the atmosphere}}
{{Further|Air quality law}}
{{Environmental law}}

'''Emission standards ''' <section begin=overview /><!-- this paragraph is transcluded to [[air quality law]] -->are the legal requirements governing [[Air pollution|air pollutants]] released into the [[atmosphere]]. Emission standards set quantitative limits on the permissible amount of specific [[Air pollution|air pollutants]] that may be released from specific sources over specific timeframes. They are generally designed to achieve air quality standards and to protect human life. Different regions and countries have different standards for vehicle emissions. <section end=overview />

== Regulated sources ==
Many emissions standards focus on regulating pollutants released by [[Motor vehicle emissions|automobiles]] (motor cars) and other powered [[vehicle]]s. Others regulate emissions from [[Industrial sector|industry]], power plants, small equipment such as lawn mowers and diesel [[electrical generator|generators]], and other sources of [[air pollution]].

The first automobile emissions standards were enacted in 1963 in the United States, mainly as a response to [[Los Angeles]]' [[Smog#LA|smog problems]]. Three years later Japan enacted their first emissions rules, followed between 1970 and 1972 by Canada, Australia, and several European nations.<ref name=QR399151>{{cite magazine | ref = EZV | magazine = Quattroruote | title = Entriamo in Zona Verde | trans-title = Entering the Green Zone | language = it | date = January 1989 | volume = 34 | issue = 399 | publisher = Editoriale Domus | location = Milan, Italy | first = Giuseppe | last = Dicorato | page = 151 }}</ref> The early standards mainly concerned carbon monoxide (CO) and hydrocarbons (HC). Regulations on nitrogen oxide emissions (NO<sub>x</sub>) were introduced in the United States, Japan, and Canada in 1973 and 1974, with Sweden following in 1976 and the [[European Economic Community]] in 1977. These standards gradually grew more and more stringent but have never been unified.<ref name=QR399152>[[#EZV|Dicorato]], p. 152</ref>

There are largely three main sets of standards: United States, Japanese, and European, with various markets mostly using these as their base.<ref name=QR399152/> Sweden, Switzerland, and Australia had separate emissions standards for many years but have since adopted the European standards. [[Bharat stage emission standards|India]], [[#China|China]], and other newer markets have also begun enforcing vehicle emissions standards (derived from the European requirements) in the twenty-first century, as growing vehicle fleets have given rise to severe air quality problems there, too.

==Vehicle emission performance standard==
{{More citations needed section|date=January 2009}}
An '''emission performance standard''' is a limit that sets thresholds above which a different type of [[vehicle emissions control]] technology might be needed.  While emission performance standards have been used to dictate limits for conventional [[pollutants]] such as [[oxides of nitrogen]] and [[Lower sulfur oxides|oxides of sulphur]] (NO<sub>x</sub> and SO<sub>x</sub>),<ref>{{Cite web |title=Smog Check – Vehicle Emissions Tests |url=http://www.emissions.org/publications/member_articles/ef9ema.pdf|website=Emissions.org |archiveurl=https://web.archive.org/web/20081120153824/http://www.emissions.org/publications/member_articles/ef9ema.pdf |url-status=dead |archivedate=November 20, 2008}}</ref> this regulatory technique may be used to regulate [[greenhouse gas]]es, particularly [[carbon dioxide]] ({{CO2}}). In the US, this is given in pounds of carbon dioxide per [[Watt-hour|megawatt-hour]] (lbs. {{CO2}}/MWhr), and kilograms {{CO2}}/MWhr elsewhere.

==Africa==
===ECOWAS===
* Since 1 January 2021, all new vehicles in [[ECOWAS]] must comply with Euro 4.<ref>{{Cite web|url=http://www.unep.org/news-and-stories/story/west-african-ministers-adopt-cleaner-fuels-and-vehicles-standards|title=West African Ministers adopt cleaner fuels and vehicles standards|date=27 February 2020|website=UNEP}}</ref>

===Morocco===
From 1 January 2024, all new vehicles in Morocco must comply with Euro 6b.<ref>{{Cite web|url=https://www.challenge.ma/norme-antipollution-le-maroc-passe-officiellement-a-leuro-6-des-2022-223698/|title=Norme antipollution. Le Maroc passe officiellement au carburant Euro 6 dès 2022 |website=Challenge.ma}}</ref>

===South Africa===
South Africa's first clean fuels programme was implemented in 2006 with the banning of lead from petrol and the reduction of sulphur levels in diesel from 3,000 parts per million (ppm) to 500&nbsp;ppm, along with a niche grade of 50&nbsp;ppm.

The Clean Fuels 2 standard, expected to begin in 2017, includes the reduction of sulphur to 10&nbsp;ppm; the lowering of benzene from 5 percent to 1 percent of volume; the reduction of aromatics from 50 percent to 35 percent of volume; and the specification of olefins at 18 percent of volume.

==North America==
{{Expand section|date=June 2008}}

===Canada===
In [[Canada]], the [[Canadian Environmental Protection Act, 1999]] (CEPA 1999) transfers the legislative authority for regulating emissions from on-road vehicles and engines to [[Environment Canada]] from Transport Canada's Motor Vehicle Safety Act.
The Regulations align emission standards with the U.S. federal standards and apply to light-duty vehicles (e.g., passenger cars), light-duty trucks (e.g., vans, pickup trucks, sport utility vehicles), heavy-duty vehicles (e.g., trucks and buses), heavy-duty engines and motorcycles.<ref name="Vehicle and Engine Regulations">{{cite web|url=https://www.ec.gc.ca/air/default.asp?lang=En&n=AE4ECEC1-1 |title=Vehicle and Engine Regulations|publisher=Environment Canada|date=Jul 17, 2013}}</ref>

===Mexico===
* From 1 July 2019, all new heavy vehicles must comply with EPA 07 and Euro 5.<ref name="t21">{{Cite web|url=http://t21.com.mx/terrestre/2021/11/26/semarnat-publica-dof-modificacion-nom-044|title=Semarnat publica en el DOF modificación a la NOM-044|website=t21.com.mx}}</ref>
* From 1 January 2025, all new heavy vehicles must comply with EPA 10 and Euro 6.<ref name="t21" />

===United States===
{{Main|United States vehicle emission standards}}
The United States has its own set of emissions standards that all new vehicles must meet. In the [[United States]], emissions standards are managed by the [[United States Environmental Protection Agency|Environmental Protection Agency]] (EPA). It uses tiers to identify emission standards for cars, trucks and other motor vehicles.<ref>{{Cite web |last=US EPA |first=OAR |date=2014-01-21 |title=All EPA Emission Standards |url=https://www.epa.gov/emission-standards-reference-guide/all-epa-emission-standards |access-date=2024-09-01 |website=[[United States Environmental Protection Agency]] |language=en}}</ref> In 2014, the EPA published its "Tier 3" standards for these vehicles, which tightened air pollution emission requirements and lowered the sulfur content in gasoline.<ref>U.S. Environmental Protection Agency (EPA), Washington, D.C. (2014-04-18). "Control of Air Pollution From Motor Vehicles: Tier 3 Motor Vehicle Emission and Fuel Standards." Final rule. ''Federal Register,'' {{USFR|79|23414}}</ref>

EPA has separate regulations for small engines, such as [[groundskeeping equipment]]. The states must also promulgate miscellaneous emissions regulations in order to comply with the [[National Ambient Air Quality Standards]].<ref>{{cite web |title=EPA Emission Standards for Nonroad Engines and Vehicles |url=https://www.epa.gov/emission-standards-reference-guide/epa-emission-standards-nonroad-engines-and-vehicles |date=2022-09-13 |publisher=EPA}}</ref>

In December 2021 EPA issued new [[Greenhouse gas emissions|greenhouse gas]] standards for passenger cars and light trucks, effective for the 2023 vehicle model year.<ref>{{cite web |title=EPA Finalizes Greenhouse Gas Standards for Passenger Vehicles, Paving Way for a Zero-Emissions Future |url=https://www.epa.gov/newsreleases/epa-finalizes-greenhouse-gas-standards-passenger-vehicles-paving-way-zero-emissions |date=2021-12-20 |publisher=EPA |id=News Release}}</ref>

====State-level standards====
{{Update|section|date=December 2022}}
Under federal law, the state of [[California]] is allowed to promulgate more stringent vehicle emissions standards (subject to EPA approval), and other states may choose to follow either the national or California standards.  California had produced air quality standards prior to EPA, with severe [[Los Angeles#Environmental issues|air quality problems in the Los Angeles]] metropolitan area.  LA is the country's second-largest city, by population, and relies much more heavily on automobiles and has less favorable meteorological conditions than the largest and third-largest cities (New York and Chicago).<ref>{{Cite web   |title=City and Town Population Totals: 2020-2021 |url=https://www.census.gov/data/tables/time-series/demo/popest/2020s-total-cities-and-towns.html |access-date=2023-05-02 |website=Census.gov}}</ref><ref>{{Cite journal |last1=Littman |first1=Fred E. |last2=Magill |first2=P. L. |date=2012 |title=Some Unique Aspects of Air Pollution in Los Angeles |journal=Air Repair |language=en |volume=3 |issue=1 |pages=29–34 |doi=10.1080/00966665.1953.10467586 |issn=0096-6665|doi-access=free }}</ref>

Some states have areas within the state that require emissions testing while other cities within the state do not require emission testing. Arizona emissions testing locations are located primarily in the two largest metropolitan areas (Phoenix and Tucson). People outside of these areas are not required to submit their vehicle for testing as these areas are the only ones that have failed the air quality tests by the state.

California's emissions standards are set by the [[California Air Resources Board]] (CARB).  By mid-2009, 16 other states had adopted CARB rules;<ref>{{cite web|url=http://auto.howstuffworks.com/fuel-efficiency/fuel-economy/carb4.htm|title=How the California Air Resources Board (CARB) Works|date=12 September 2008|website=howstuffworks.com|access-date=4 April 2018}}</ref> given the size of the California market plus these other states, many manufacturers choose to build to the CARB standard when selling in all 50 states.  CARB's policies have also influenced EU emissions standards.{{cn|date=February 2024}}

California is attempting to regulate [[greenhouse gas emissions]] from automobiles, but faces a court challenge from the federal government.  The states are also attempting to compel the federal EPA to regulate greenhouse gas emissions, which as of 2007 it has declined to do.  On 19 May 2009, news reports indicate that the Federal EPA will largely adopt California's standards on greenhouse gas emissions.<ref>{{Cite news |last=Simon |first=Richard |date=2009-05-19 |title=U.S. to limit greenhouse gas emissions from autos |url=https://www.latimes.com/archives/la-xpm-2009-may-19-na-emissions19-story.html |newspaper=Los Angeles Times}}</ref>

California and several other western states have passed bills requiring [[performance-based regulation]] of greenhouse gases from electricity generation.

In an effort to decrease emissions from heavy-duty diesel engines faster, CARB's [[Carl Moyer Program]] funds upgrades that are in advance of regulations.

The California ARB standard for light vehicle emissions is a regulation of equipment first, with verification of emissions second. The property owner of the vehicle is not permitted to modify, improve, or innovate solutions in order to pass a true emissions-only standard set for their vehicle driven on public highways. Therefore, California's attempt at regulation of emissions is a regulation of equipment, not of air quality. Vehicle owners are excluded from modifying their property in any way that has not been extensively researched and approved by CARB and still operate them on public highways. {{POV statement|date=November 2016}}

==South America==

===Argentina===
* From 1 January 2016, all new heavy vehicles in Argentina must comply with Euro 5.<ref>{{Cite web|url=https://www.16valvulas.com.ar/en-el-2016-entrara-en-vigor-la-norma-euro-v-para-camiones-y-transporte-de-pasajeros/|title=En el 2016 entrará en vigor la norma Euro V para camiones y transporte de pasajeros|first=Daniel|last=Panzera|date=September 1, 2015|website=16 Valvulas}}</ref>
* From 1 January 2018, all new light and heavy vehicles in Argentina must comply with Euro 5.<ref>{{Cite web|url=https://ar.motor1.com/news/476398/dpf-la-sigla-que-se-convirtio-en-un-dolor-de-cabeza-para-automotrices-y-usuarios-argentinos/|title=DPF: la sigla que se convirtió en un dolor de cabeza para automotrices y usuarios argentinos|website=Motor1.com}}</ref>

===Brazil===
{{Main|PROCONVE}}
* From 1 January 2012, all new heavy vehicles in Brazil must comply with [[:pt:Programa de Controle da Poluição do Ar por Veículos Automotores|Proconve P7]] (similar to Euro 5)<ref>{{Cite web|url=https://www.dgabc.com.br/Noticia/247910/industria-pronta-para-euro-5-em-2012|title=Indústria pronta para Euro 5 em 2012 - Diário do Grande ABC - Notícias e informações do Grande ABC: economia|website=Dgabc.com.br|date=26 March 2011 }}</ref>
* From 1 January 2015, all new light vehicles in Brazil must comply with Proconve L6 (similar to Euro 5).<ref>{{cite web|url=http://www.ibama.gov.br/phocadownload/veiculosautomotores/manual_proconve%20promot_portugues.pdf|title=Programa de Controle da Poluição do Ar por Veículos Automotores|website=Ibama.gov.br|access-date=26 July 2022}}</ref>
* From 1 January 2022, all new light vehicles in Brazil must comply with Proconve L7 (similar to Euro 6).<ref>{{Cite web|url=https://autoesporte.globo.com/mercado/noticia/2021/12/nova-lei-de-emissoes-vai-tirar-de-linha-6-carros-e-4-motores-ate-o-fim-do-ano-veja-lista.ghtml|title=Nova lei de emissões vai tirar de linha 6 carros e 4 motores até o fim do ano; veja lista|website=Autoesporte.globo.com|date=3 December 2021 }}</ref>
* From 1 January 2023, all new heavy vehicles in Brazil must comply with Proconve P8 (similar to Euro 6).<ref>{{Cite web|url=https://estradao.estadao.com.br/caminhoes/novos-limites-de-emissoes-vao-aquecer-venda-de-implementos-rodoviarios|title=Novos limites de emissões vão aquecer venda de implementos rodoviários|website=Estradao.estadao.com.br|date=11 February 2022}}</ref>
* From 1 January 2025, the new light vehicle fleets in Brazil must comply with the first stage of Proconve L8 (automaker average).<ref>{{cite web|url=http://conama.mma.gov.br/?option=com_sisconama&task=arquivo.download&id=765|title=MINISTÉRIO DO MEIO AMBIENTE CONSELHO NACIONAL DO MEIO AMBIENTE RESOLUÇÃO N. 492, DE 20 DE DEZEMBRO DE 2018|website=Conama.mma.gov.br|access-date=26 July 2022}}</ref>

===Chile===
* From September 2014, all new cars in Chile must comply with Euro 5.<ref>{{Cite web|url=https://www.latercera.com/noticia/euro-5-la-norma-de-emisiones-para-vehiculos-que-empieza-este-ano-y-que-posiciona-a-chile-como-lider-en-latinoamerica/|title=Euro 5: la norma de emisiones para vehículos que empieza este año y que posiciona a Chile como líder en Latinoamérica|first=Catalina Rojas|last=O|date=4 February 2013|website=La Tercera}}</ref>
* From September 2022, all new light and medium vehicle models in Chile must comply with Euro 6b.<ref name="autocosmos">{{Cite web|url=https://noticias.autocosmos.cl/2020/10/02/chile-avanza-hacia-la-norma-de-emisiones-euro-6b|title=Chile avanza hacia la norma de emisiones Euro 6b|date=2 October 2020|website=Autocosmos}}</ref>
* From 30 September 2025, all new light and medium vehicle models in Chile must comply with Euro 6c.<ref>{{Cite web|url=https://www.anac.cl/anac-aclara-que-norma-de-emisiones-euro-6c-comenzara-a-regir-desde-el-30-de-septiembre-de-2025/|title=ANAC aclara que norma de emisiones Euro 6c comenzará a regir desde el 30 de septiembre de 2025 – Anac}}</ref>

===Colombia===
* From 1 January 2023, all new vehicles in Colombia must comply with Euro 6b.<ref>{{Cite web|url=https://www.semana.com/economia/empresas/articulo/el-transporte-en-colombia-esta-listo-para-la-euro-vi/202240/|title=¿El transporte en Colombia está listo para la Euro VI?|date=16 March 2022|website=Semana.com Últimas Noticias de Colombia y el Mundo}}</ref><ref>{{Cite web|url=https://www.minambiente.gov.co/documento-entidad/ley-1972-de-2019/|title=Ley 1972 de 2019}}</ref>

===Peru===
* From 1 April 2018, Euro 4, Tier 2, and EPA 2007 are mandated.<ref>{{Cite web|url=http://www.unep.org/news-and-stories/press-release/peru-adopts-euro-4-iv-vehicle-emissions-standards-improved-air|title=Peru adopts Euro 4 / IV vehicle emissions standards for improved air quality|date=December 18, 2017|website=UN Environment}}</ref>
* From 1 October 2024, Euro 6b, Tier 3, and EPA 2010 are mandated.<ref>{{cite web |url=https://www.gob.pe/institucion/minam/normas-legales/2213166-029-2021-minam|title=Decreto Supremo que modifica el Decreto Supremo N° 010-2017-MINAM, que establece Límites Máximos Permisibles de emisiones atmosféricas para vehículos automotores |trans-title=Maximum permissible limits of atmospheric emissions for motor vehicles |location=Peru |language=Spanish |id=2021-MINAM |year=2021 |access-date=2023-12-18}}</ref>

==Asia==
===Cambodia===
Since 1 January 2022, all new vehicles in Cambodia must comply with Euro 4.<ref name="cambodia">{{Cite web|url=https://www.ccacoalition.org/news/cambodia-drivers-seat-toward-euro-vi-standards|title=Cambodia In The Driver's Seat Toward Euro VI Standards &#124; Climate & Clean Air Coalition|website=www.ccacoalition.org}}</ref>

From 1 January 2027, all new vehicles in Cambodia must comply with Euro 5.<ref name="cambodia"/>

===China===

{{See also|Energy policy of China}}
Due to rapidly expanding wealth and prosperity, the number of [[coal power plant]]s and cars on China's roads is rapidly growing, creating an ongoing pollution problem.  China enacted its first emissions controls on automobiles in 2000, equivalent to Euro I standards.  China's State Environmental Protection Administration (SEPA) upgraded emission controls again on 1 July 2004 to the Euro II standard.<ref>{{cite web|url=http://www.chinadaily.com.cn/english/doc/2004-07/07/content_346332.htm |title=China to adopt auto emission standard equal to Euro III in 2008 |publisher=Chinadaily.com.cn |date=2004-07-07 |access-date=2011-02-02}}</ref> More stringent emission standard, National Standard III, equivalent to Euro III standards, went into effect on 1 July 2007.<ref>{{cite web|url=http://english.cri.cn/2946/2007/07/02/176@244647.htm |archive-url=https://web.archive.org/web/20071114214828/http://english.cri.cn/2946/2007/07/02/176@244647.htm |url-status=dead |archive-date=November 14, 2007 |title=China Launches Tougher Auto Emission Standard |publisher=English.cri.cn |access-date=2011-02-02}}</ref>  Plans were for Euro IV standards to take effect in 2010. Beijing introduced the Euro IV standard in advance on 1 January 2008, becoming the first city in mainland China to adopt this standard.<ref>{{cite web|url=http://www.automotiveworld.com/AEM/content.asp?contentid=65589 |title=China: Beijing launches Euro 4 standards |publisher=Automotiveworld.com |date=2008-01-04 |access-date=2011-02-02}}</ref>
* Since 1 January 2018, all new vehicles must comply with China 5 (similar to Euro 5).<ref>{{cite web|url=https://theicct.org/wp-content/uploads/2021/06/ICCTupdate_Guangdong-China5V_20150508.pdf |date=May 2015|title=EARLY ADOPTION OF CHINA 5/V VEHICLE EMISSION STANDARDS IN GUANGDONG PROVINCE|website=Theicct.org|access-date=2022-07-27}}</ref>
* Since 1 January 2021, all new vehicles in China must comply with China 6a (similar to Euro 6).<ref name="dieselnet">{{Cite web|url=https://dieselnet.com/standards/cn/ld.php|title=Emission Standards: China: Cars and Light Trucks|website=dieselnet.com}}</ref>
* Since 1 July 2023, all new vehicles in China must comply with China 6b (stricter than Euro 6).<ref name="dieselnet" />

===Hong Kong===
{{See also|Air pollution in Hong Kong}}
From 1 January 2006, all new passenger cars with spark-ignition engines in [[Hong Kong]] must meet either Euro IV petrol standard, Japanese Heisei 17 standard or US EPA Tier 2 Bin 5 standard. For new passenger cars with compression-ignition engines, they must meet US EPA Tier 2 Bin 5 standard.

The current standard is Euro 6C, it has been phased in since 2019.

===India===
{{Main|Bharat stage emission standards}}

Bharat stage emission standards are emission standards instituted by the Government of India to regulate the output of air pollutants from internal combustion engine equipment, including motor vehicles. The standards and the timeline for implementation are set by the Central Pollution Control Board under the Ministry of Environment & Forests.

The standards, based on European regulations were first introduced in 2000. Progressively stringent norms have been rolled out since then. All new vehicles manufactured after the implementation of the norms have to be compliant with the regulations. By 2014, the country was under a combination of Euro 3 and Euro 4-based norms, with Euro 4 standards partly implemented in 13 major cities. Till April 2017, the entire country was under BS IV norms, which is based on Euro 4.<ref name="Lathia 1339–1346">{{Cite journal|last1=Lathia|first1=Rutvik|last2=Dadhaniya|first2=Sujal|date=2019-01-20|title=Policy norms and proposed ways to achieve goals of Indian vehicle emission program|url=http://www.sciencedirect.com/science/article/pii/S0959652618332244|journal=Journal of Cleaner Production|language=en|volume=208|pages=1339–1346|doi=10.1016/j.jclepro.2018.10.202|s2cid=158500168|issn=0959-6526|url-access=subscription}}</ref>

As of now manufacturing and registration of BS VI vehicles has started, from April 2020 all BS VI manufacturing is mandatory, respectively.<ref name="Lathia 1339–1346"/><ref>{{Cite news|url=https://www.autocarindia.com/car-news/bs6-emission-norms-all-you-need-to-know-413968|title=Clearing the air on BS6|author=Nishant Parekh|date=August 30, 2019|work=Autocarindia.com}}</ref>

===Japan===
''' Background '''

Starting 10 June 1968, the Japanese Government passed the {{ill|Air Pollution Control Act (Japan)|lt=Air Pollution Control Act|ja|大気汚染防止法||vertical-align=sup}} which regulated all sources of air pollutants. As a result of the 1968 law, dispute resolutions were passed under the 1970 {{ill|Air Pollution Dispute Resolution Act|ja|公害紛争処理法|vertical-align=sup}}. As a result of the 1970 law, in 1973 the first installment of four sets of new emissions standards were introduced. Interim standards were introduced on 1 January 1975, and again for 1976. The final set of standards were introduced for 1978.<ref name="WC79j">{{Citation | first = Jack K. | last = Yamaguchi | editor-last = Lösch | editor-first = Annamaria | journal = World Cars 1979 | title = The Year of Uncertainty? | publisher = The Automobile Club of Italy/Herald Books | location = Pelham, NY | pages = 61–62 | year = 1979 | isbn = 0-910714-11-8 }}</ref> While the standards were introduced they were not made immediately mandatory, instead tax breaks were offered for cars which passed them.<ref name="WC77j">{{Citation | first = Jack K. | last = Yamaguchi | journal = World Cars 1977 | title = The Year of the Third Power | publisher = The Automobile Club of Italy/Herald Books | location = Pelham, NY | page = 54 | year = 1977 | isbn = 0-910714-09-6 }}</ref> The standards were based on those adopted by the original [[Clean Air Act (United States)|US Clean Air Act]] of 1970, but the test cycle included more slow city driving to correctly reflect the Japanese situation.<ref name="WC78j">{{Citation | first = Jack K. | last = Yamaguchi | editor-last = Lösch | editor-first = Annamaria | journal = World Cars 1978 | title = Successes- Excesses | publisher = The Automobile Club of Italy/Herald Books | location = Pelham, NY | page = 61 | year = 1978 | isbn = 0-910714-10-X }}</ref> The 1978 limits for ''mean emissions'' during a "Hot Start Test" of CO, hydrocarbons, and {{NOx}} were {{convert|2.1|g/km|g/mi|2}} of CO, {{convert|0.25|g/km|g/mi|2}} of HC, and {{convert|0.25|g/km|g/mi|2}} of {{NOx}} respectively.<ref name="WC78j"/> Maximum limits are {{convert|2.7|g/km|g/mi|2}} of CO, {{convert|0.39|g/km|g/mi|2}} of HC, and {{convert|0.48|g/km|g/mi|2}} of {{NOx}}. One interesting detail of the Japanese emissions standards was that they were introduced in a soft manner; that is, 1978 model year cars could be sold that did not meet the 1978 standards, but they would suffer various tax penalties. This gave manufacturers breathing room to properly engineer solutions and also incentivized fixing the best-selling models first, leading to smoother adoption of clean air standards and fewer drivability concerns than in many other markets.

The "[[Fuel economy in automobiles#Japan|10 - 15 Mode Hot Cycle]]" test, used to determine individual fuel economy ratings and emissions observed from the vehicle being tested, use a specific testing regime.<ref>{{cite web|url=http://www.walshcarlines.com/pdf/Global%20Vehicle%20Emissions%20Standards%20Tables.pdf|title=Japanese gasoline emission limits|page=28|website=Walshcarlines.com|access-date=2022-07-27}}</ref><ref>{{cite web|url=http://www.dieselnet.com/standards/cycles/jp_10-15mode.php|title=Emission Test Cycles: Japanese 10-15 Mode|website=Dieselnet.com|access-date=4 April 2018}}</ref><ref>{{cite web|url=http://www.fuelsaver.govt.nz/explain.html|title=Fuel economy label generator|website=Fuel economy label generator|access-date=4 April 2018}}</ref>

In 1992, to cope with {{NOx}} pollution problems from existing vehicle fleets in highly populated metropolitan areas, the Ministry of the Environment adopted the {{ill|Law Concerning Special Measures to Reduce the Total Amount of Nitrogen Oxides Emitted from Motor Vehicles in Specified Areas|ja|自動車から排出される窒素酸化物及び粒子状物質の特定地域における総量の削減等に関する特別措置法|vertical-align=sup}}, called in short The Motor Vehicle {{NOx}} Law. The regulation designated a total of 196 communities in the Tokyo, Saitama, Kanagawa, Osaka and Hyogo Prefectures as areas with significant air pollution due to nitrogen oxides emitted from motor vehicles. Under the Law, several measures had to be taken to control {{NOx}} from in-use vehicles, including enforcing emission standards for specified vehicle categories.

The regulation was amended in June 2001 to tighten the existing {{NOx}} requirements and to add PM control provisions. The amended rule is called the "Law Concerning Special Measures to Reduce the Total Amount of Nitrogen Oxides and Particulate Matter Emitted from Motor Vehicles in Specified Areas", or in short the Automotive {{NOx}} and PM Law.

;Emission Standards

The {{NOx}} and PM Law introduces emission standards for specified categories of in-use highway vehicles including commercial goods (cargo) vehicles such as trucks and vans, buses, and special purpose motor vehicles, irrespective of the fuel type. The regulation also applies to diesel powered passenger cars (but not to gasoline cars).

In-use vehicles in the specified categories must meet 1997/98 emission standards for the respective new vehicle type (in the case of heavy duty engines {{NOx}} = 4.5 g/kWh, PM = 0.25 g/kWh). In other words, the 1997/98 new vehicle standards are retroactively applied to older vehicles already on the road. Vehicle owners have two methods to comply:

# Replace old vehicles with newer, cleaner models
# Retrofit old vehicles with approved {{NOx}} and PM control devices

Vehicles have a grace period, between 8 and 12 years from the initial registration, to comply. The grace period depends on the vehicle type, as follows:
* Light commercial vehicles (GVW ≤ 2500&nbsp;kg): 8 years
* Heavy commercial vehicles (GVW > 2500&nbsp;kg): 9 years
* Micro buses (11-29 seats): 10 years
* Large buses (≥ 30 seats): 12 years
* Special vehicles (based on a cargo truck or bus): 10 years
* Diesel passenger cars: 9 years

Furthermore, the regulation allows fulfillment of its requirements to be postponed by an additional 0.5–2.5 years, depending on the age of the vehicle. This delay was introduced in part to harmonize the {{NOx}} and PM Law with the Tokyo diesel retrofit program.

The {{NOx}} and PM Law is enforced in connection with Japanese vehicle inspection program, where non-complying vehicles cannot undergo the inspection in the designated areas. This, in turn, may trigger an injunction on the vehicle operation under the Road Transport Vehicle Law.

==== Emission Regulations in Japan for vehicles ====
Table chart for Gasoline-fueled or LPG- fueled Motor Vehicles, Diesel-Powered Motor Vehicles, and Vehicle Fuel Efficiency Standards.<ref>{{Cite web |title=Emission Regulation in Japan for vehicles – Japan Inspection Organization |url=https://japaninspection.org/emission-regulation-in-japan-for-vehicle/ |access-date=2024-01-03 |language=en}}</ref>

===Thailand===
From 1 January 2024, all new vehicles in Thailand must comply with Euro 5.<ref>{{Cite web|url=https://www.pattayamail.com/thailandnews/thailand-approves-delay-on-imposing-euro-5-emission-standard-on-new-vehicles-425033|title=Thailand approves delay on imposing Euro 5 emission standard on new vehicles|website=Pattaya Mail|date=22 February 2023}}</ref>

===Turkey===
Diesel and gasoline sulphur content is regulated at 10&nbsp;ppm.<ref>{{cite web |url=https://wedocs.unep.org/bitstream/handle/20.500.11822/17130/Turkey.pdf?sequence=1&isAllowed=y |access-date=7 February 2019|title=Country Name Turkey|website=Wedocs.unep.org}}</ref> Turkey currently follows Euro VI for heavy duty commercial vehicles,<ref>{{cite news |title=Left in the dust: Brazil might be the last major automotive market to adopt Euro VI standards |url=https://www.theicct.org/blog/staff/brazil-last-major-market-adopt-euro-vi |publisher=International Council on Clean Transportation |date=23 May 2018}}</ref> and, in 2016 a couple of years after the EU, Turkey adopted Euro 6 for new types of light duty vehicles (LDV) and new types of passenger cars.<ref>{{cite web |title=THE AUTOMOTIVE SECTOR IN TURKEY A BASELINE ANALYSIS OF VEHICLE FLEET STRUCTURE, FUEL CONSUMPTION AND EMISSIONS |url=https://www.theicct.org/sites/default/files/publications/ICCT_Turkish-fleet-baseline_20160318.pdf |publisher=International Council on Clean Transportation|access-date=6 February 2019}}</ref> Turkey is planning to use the [[worldwide harmonized light vehicles test procedure]] (WLTP).<ref>{{cite news |title=New WLTP emissions test: when it's in force and how it could affect your car |url=https://www.autocar.co.uk/car-news/industry/new-wltp-emissions-test-when-its-force-and-how-it-could-affect-your-car |website=Autocar.co.uk |date=17 April 2018}}</ref>

However, despite these tailpipe emission standards for new vehicle types there are many older diesel vehicles,<ref>{{cite news |title=Diesel cars increase by 116% in last 5 years in Turkey |url=https://www.aa.com.tr/en/energy/oil/diesel-cars-increase-by-116-in-last-5-years-in-turkey/3676 |agency=Anadolu Agency |date=10 February 2017}}</ref> no [[low-emission zone]]s and no national limit on PM2.5 [[particulates]] so local pollution, including from older vehicles, is still a major health risk in some cities, such as [[Ankara]].<ref>{{cite news |title=Only six Turkish cities have clean air, report says |url=https://ahvalnews.com/environment/only-six-turkish-cities-have-clean-air-report-says |publisher=Ahval |date=7 January 2018}}</ref><ref>{{cite web |title=Air Pollution and Health in Turkey |url=https://env-health.org/IMG/pdf/150220_factsheet_air_and_health_turkey_en_final.pdf |publisher=Health and Environment Alliance (HEAL) |access-date=6 February 2019}}</ref> Concentrations of PM2.5 are 41&nbsp;μg/m<sup>3</sup> in Turkey, making it the country with the worst air pollution in Europe.<ref>{{cite web |title=Mapped: Europe's Most and Least Polluted Countries |url=https://www.greenmatch.co.uk/blog/2018/11/mapped-europes-most-and-least-polluted-countries|website=Greenmatch.co.uk |access-date=6 February 2019}}</ref> The regulation for testing of existing vehicle exhaust gases is Official Newspaper number 30004 published 11 March 2017.

An average of 135&nbsp;g {{CO2}}/km for LDVs compared well with other countries in 2015,<ref>{{cite web |title=International comparison of light-duty vehicle fuel economy: Turkey |url=https://www.globalfueleconomy.org/media/461048/me-and-wa_turkey.pdf |website=Globalfueleconomy.org|access-date=7 February 2019}}</ref> however unlike the EU<ref>{{cite web |title={{CO2}} emission standards for cars and vans: Council confirms agreement on stricter limits |url=https://www.consilium.europa.eu/en/press/press-releases/2019/01/16/co2-emission-standards-for-cars-and-vans-council-confirms-agreement-on-stricter-limits/ |publisher=European Council |access-date=7 February 2019}}</ref> there is no limit on carbon dioxide emissions.<ref>{{cite web |title=Reducing vehicle emissions in Turkey |url=https://www.theicct.org/publications/reducing-vehicle-emissions-turkey |publisher=International Council on Clean Transportation |access-date=6 February 2019}}</ref>

===Vietnam===
From 1 January 2022, all new cars in Vietnam must comply with Euro 5.<ref>{{Cite web|url=https://en.vietnamplus.vn/euro-5-emission-standards-to-be-rolled-out-for-new-cars-in-vietnam-early-2022/217944.vnp|title=Euro 5 emission standards to be rolled out for new cars in Vietnam early 2022 &#124; Environment &#124; Vietnam|date=December 10, 2021|website=En.vietnamplus.vn}}</ref>

==Europe==
Before the European Union began streamlining emissions standards, there were several different sets of rules. Members of the [[European Economic Community]] (EEC) had a unified set of rules, considerably laxer than those of the United States or Japan. These were tightened gradually, beginning on cars of over two liters displacement as the price increase would have less of an impact in this segment.<ref name=QR399151/> The ECE&nbsp;15/05 norms (also known as the Luxemburg accord, strict enough to essentially require catalytic converters) began taking effect gradually: the initial step applied to cars of over 2000&nbsp;cc in two stages, in October 1988 and October 1989.<ref name=QR399152/> There followed cars between 1.4 and 2.0 liters, in October 1991 and then October 1993. Cars of under 1400&nbsp;cc had to meet two subsequent sets of regulations that applied in October 1992 and October 1994 respectively.<ref name=QR399154>[[#EZV|Dicorato]], p. 154</ref> French and Italian car manufacturers, strongly represented in the small car category, had been lobbying heavily against these regulations throughout the 1980s.<ref name=W1985>{{cite journal | journal = Die Welt | url = https://archive.org/stream/DieWelt1985GermanyGerman/Apr%2019%201985%2C%20Die%20Welt%2C%20%2391%2C%20Germany%20%28de%29_djvu.txt | date = 1985-04-19 | issue = 91 | language = de | page = 5 | title = Das schadstoffarme Auto: Fragen und Antworten | trans-title = The clean car: Questions and Answers }}</ref>

Within the EEC, Germany was a leader in regulating automobile emissions. Germany gave financial incentives to buyers of cars that met US or ECE standards, with lesser credits available to those that partially fulfilled the requirements. These incentives had a strong impact; only 6.5 percent of new cars registered in Germany in 1988 did not meet any emissions requirements and 67.3 percent were compliant with the strictest US or ECE standards.<ref name=QR399151/>

Sweden was one of the first countries to instill stricter rules, in 1975. The legislations required significant modifications and thus severely limited the number of vehicles available there, as manufacturers could not justify the expenditure to meet specific regulations that applied only in one very small market. These standards also caused drivability problems and steeply increased fuel consumption. In 1982, the [[European Economic Community|European Community]] calculated that the Swedish standards increased fuel consumption by 9 percent, while making cars 2.5 percent more expensive.<ref name=TV218254>{{cite magazine | title = Avgaskrav slukar bensin | trans-title = Emissions requirements devour petrol | ref = TVn21 | language = sv | magazine = [[Teknikens Värld]] | publisher = Specialtidningsförlaget AB | location = Stockholm, Sweden | page = 54 | date = 1982-10-06 | issue = 21 | volume = 34 | editor-first = Börje | editor-last = Isakson }}</ref> In 1983, Switzerland (and then Australia) joined in the same set of regulations, which gradually increased the number of certified engines.<ref name=TV218244>{{cite magazine | title = Alfa med ny spänst | trans-title = Alfa with new vitality | ref = TVn21 | language = sv | magazine = [[Teknikens Värld]] | publisher = Specialtidningsförlaget AB | location = Stockholm, Sweden | page = 44 | date = 1982-10-06 | issue = 21 | volume = 34 | first = Dag E. | last = Hogsten }}</ref> One problem with the strict standards was that they did not account for catalyzed engines, meaning that vehicles thus equipped had to have the catalytic converters removed before they could be legally registered.

In 1985 the first catalyzed cars entered certain European markets such as Germany. At first, the availability of unleaded petrol was limited and sales were small. In Sweden, catalyzed vehicles became allowed in 1987, benefitting from a tax rebate to boost sales.<ref name=lag>{{cite act |type= Motion |index= 1997/98:Jo714 |date= 29 September 1997 |article= |article-type= |legislature= [[Riksdag]] [Swedish Parliament] |title= Krav på katalysatorrening för alla bilar i trafik |trans-title= Demand for catalyzing all vehicles in traffic |page= |url= https://www.riksdagen.se/sv/dokument-lagar/dokument/motion/krav-pa-katalysatorrening-for-alla-bilar-i-trafik_GL02Jo714 |language= sv }}</ref> By 1989 the Swiss/Swedish emissions rules were tightened to the point that non-catalyzed cars were no longer able to be sold. In early 1989 the [[BMW Z1]] was introduced, only available with catalyzed engines. This was a problem in some places like Portugal, where unleaded fuel was still almost non-existent, although European standards required unleaded gasoline to be "available" in every country by 1 October 1989.<ref name=QR399155>[[#EZV|Dicorato]], p. 155</ref>

===European Union===
{{Main|European emission standards}}
The main source of greenhouse gas emissions in the European Union is transportation. In 2019, it contributes to about 31% of global emissions and 24% of emissions in the EU. In addition, up to the COVID-19 pandemic, emissions have only increased in the transport economic sector.<ref name=":70">{{Cite web |title=Get on the bus first to make Nicosia tram infrastructure worth the investment |url=https://www.eib.org/en/essays/nicosia-tram-infrastructure |access-date=2022-09-01 |website=European Investment Bank |language=en}}</ref><ref>{{Cite web |title=Transport emissions |url=https://ec.europa.eu/clima/eu-action/transport-emissions_en |access-date=2022-09-01 |website=ec.europa.eu |language=en}}</ref> In 2019, about 95% of the fuel came from fossil sources.<ref>{{Cite journal |last1=Le Quéré |first1=Corinne |last2=Jackson |first2=Robert B. |last3=Jones |first3=Matthew W. |last4=Smith |first4=Adam J. P. |last5=Abernethy |first5=Sam |last6=Andrew |first6=Robbie M. |last7=De-Gol |first7=Anthony J. |last8=Willis |first8=David R. |last9=Shan |first9=Yuli |last10=Canadell |first10=Josep G. |last11=Friedlingstein |first11=Pierre |last12=Creutzig |first12=Felix |last13=Peters |first13=Glen P. |author12-link=Felix Creutzig |date=July 2020 |title=Temporary reduction in daily global CO<sub>2</sub> emissions during the COVID-19 forced confinement |journal=Nature Climate Change |language=en |volume=10 |issue=7 |pages=647–653 |doi=10.1038/s41558-020-0797-x |bibcode=2020NatCC..10..647L |s2cid=218693901 |issn=1758-6798|doi-access=free |hdl=10871/122774 |hdl-access=free }}</ref>

The European Union has its own set of emissions standards that all new vehicles must meet. Currently, standards are set for all road vehicles, trains, barges and 'nonroad mobile machinery' (such as tractors). No standards apply to seagoing ships or airplanes.

EU Regulation No 443/2009 set an average {{CO2}} [[emissions target]] for new passenger cars of 130 grams per kilometre. The target was gradually phased in between 2012 and 2015. A target of 95 grams per kilometre applies from 2021.

For light commercial vehicle, an emissions target of 175 g/km applies from 2017, and 147 g/km from 2020,<ref>{{cite web |url=http://www.theicct.org/eu-co2-standards-passenger-cars-and-lcvs|author=International Council on Clean Transportation |title=EU {{CO2}} standards for passenger cars and light-commercial vehicles|date=January 2014|access-date=5 February 2014}}</ref> a reduction of 16%.

The EU introduced Euro 4 effective 1 January 2008, Euro 5 effective 1 January 2010, and Euro 6 effective 1 January 2014. These dates had been postponed for two years to give oil refineries the opportunity to modernize their plants.

From January 2022, all new light vehicles must comply with Euro 6d. From 1 January 2023, all new motorcycles must comply with Euro 5.

===Russia===
* All new light vehicles must comply with Euro 5 since January 2016.<ref name="ru5">{{Cite web|url=https://dieselnet.com/standards/ru/|title=Emission Standards: Russia and EAEU|website=dieselnet.com}}</ref>
* All new heavy vehicles must comply with Euro 5 since 2018.<ref name="ru5" />

===UK===
{{Update|date=September 2020}}
Several [[Unitary authorities of England|local authorities]] in the UK have introduced Euro 4 or Euro 5 emissions standards for taxis and licensed private hire vehicles to operate in their area.<ref name="emissions">{{cite news|url=http://www.wokingnewsandmail.co.uk/?p=4246|title=Taxi emissions ruling set for January start|date=18 October 2013|work=Woking News & Mail|access-date=17 December 2013}}</ref><ref>{{cite web|url=http://www.chichester.gov.uk/index.cfm?articleid=22395 |title=Chichester District Council: European emission standard EURO 4 |publisher=Chichester District Council |access-date=2013-12-13 |url-status=dead|archive-url=https://web.archive.org/web/20131217225111/http://www.chichester.gov.uk/index.cfm?articleid=22395 |archive-date=2013-12-17 }}</ref><ref>{{cite web |url=http://www.plymouth.gov.uk/emissions__guidance.pdf |title=European technology emission standards: how to check your vehicle |publisher=Plymouth City Council |access-date=2013-12-13 |url-status=dead|archive-url=https://web.archive.org/web/20131217221701/http://www.plymouth.gov.uk/emissions__guidance.pdf |archive-date=2013-12-17 }}</ref>
Emissions tests on [[Diesel fuel|diesel]] cars have not been carried out during [[MOT test|MOTs]] in Northern Ireland for 12 years, despite being legally required.<ref>{{cite news|url=https://www.bbc.co.uk/news/uk-northern-ireland-45643031|title=MOT diesel test not performed in NI for 12 years|work=[[BBC Northern Ireland]] News|date=26 September 2018|access-date=26 September 2018}}</ref>

From January 2022, all new light vehicles must comply with Euro 6d.<ref>{{Cite web|url=https://www.parkers.co.uk/vans-pickups/advice/euro-6-guide/|title=Full guide to Euro 6 for vans and pickups, including Euro 6d and Euro VI|website=Parkers}}</ref> From 1 January 2023, all new motorcycles must comply with Euro 5.<ref>{{Cite web|url=https://www.honda.co.uk/engineroom/bikes/what-euro5-means-for-uk-motorcycles/|title=What Euro 5 Means for UK Motorcycles &#124; Honda Engine Room|website=www.honda.co.uk}}</ref>

== Oceania ==
=== Australia ===
Australian noxious emission standards are based on European regulations for light-duty and heavy-duty (heavy goods) vehicles, with acceptance of selected US and Japanese standards. The current policy is to fully harmonize Australian regulations with United Nations (UN) and Economic Commission for Europe (ECE) standards. In November 2013, the first stage of the stringent Euro 5 emission standards for light vehicles was introduced, which includes cars and light commercial vehicles.<ref>{{Cite web|url=https://infrastructure.gov.au/roads/environment/emission/index.aspx|title=Vehicle Emission Standards|last=Services|first=Department of Transport and Regional|website=Infrastructure.gov.au|access-date=2016-11-11}}</ref> The development of emission standards for highway vehicles and engines is coordinated by the National Transport Commission (NTC) and the regulations—Australian Design Rules (ADR)—are administered by the Department of Infrastructure and Transport.<ref>{{Cite web|url=https://www.dieselnet.com/standards/au/|title=Emission Standards: Australia: On-Road Vehicles and Engines|website=Dieselnet.com|access-date=2016-11-11}}</ref><ref>{{Cite web |last= |first= |date=2021-11-15 |title=Vehicle emission standards |url=https://www.infrastructure.gov.au/infrastructure-transport-vehicles/vehicles/vehicle-safety-environment/emission-standards |access-date=2022-02-18 |website=Department of Infrastructure, Transport, Regional Development and Communications, Australian Government |language=en}}</ref>

All new vehicles manufactured or sold in the country must comply with the standards, which are tested by running the vehicle or engine in a standardized test cycle.<ref>{{Cite news|url=http://theconversation.com/australias-weaker-emissions-standards-allow-car-makers-to-dump-polluting-cars-48172|title=Australia's weaker emissions standards allow car makers to 'dump' polluting cars|last=Mortimore|first=Anna|newspaper=The Conversation|access-date=2016-11-11}}</ref>

In April 2023, the Australian government released its National Electric Vehicle Strategy, which included a commitment to introduce a Fuel Efficiency Standard to address [[greenhouse gas emissions]].<ref>{{Cite web |last=Australia. Dept of Climate Change, Energy, the Environment and Water |date=19 April 2023 |title=The National Electric Vehicle Strategy |url=https://www.dcceew.gov.au/energy/transport/national-electric-vehicle-strategy |access-date=29 August 2023 |website=The National Electric Vehicle Strategy}}</ref> The government undertook consultation on the model for the standard in April and May 2023, and they intend to introduce legislation by the end of 2023<ref>{{Cite web |last=Costello |first=Mike |date=2023-04-19 |title=Government plans fuel efficiency standards to improve EV supply |url=https://www.carexpert.com.au/car-news/government-plans-fuel-efficiency-standards-to-improve-ev-supply |access-date=2023-08-29 |website=CarExpert |language=en}}</ref>  Research commissioned by environmental NGO Solar Citizens has calculated that a Fuel Efficiency Standard that started at 95g CO<sub>2</sub>/km and reduced to 0g CO<sub>2</sub>/km over ten years would save Australian motorists $11b over the first five years.<ref>{{Cite web |date=1 March 2023 |title=Recharging Australia : how to save Australia $11 billion in fuel costs and electrify our fleet |url=https://www.solarcitizens.org.au/roadshow_reports_australia |access-date=29 August 2023 |website=Solar Citizens}}</ref>

From December 2025, all new vehicles sold in Australia will have to comply with Euro 6d.<ref>{{Cite web|url=https://www.drive.com.au/news/strict-vehicle-emissions-rules-announced-australia-euro-6d/|title=Strict new-car emissions standards coming to Australia from 2025, utes and 4WDs among hardest hit|date=December 22, 2023|website=Drive}}</ref>

==See also==
* [[C. Arden Pope]]
* [[Carbon dioxide equivalent]]
* [[The Center for Clean Air Policy]] (in the US)
* [[Emission factor]]
* [[Emission test cycle]]
* [[Emissions trading]]
* [[Environmental standard]]
* [[European emission standards]]
* [[Driving cycle]]
* [[Flexible-fuel vehicle]]
* [[Fuel efficiency]]
* [[Mobile emission reduction credit]]
* [[Motor vehicle emissions]]
* [[National Emissions Standards for Hazardous Air Pollutants]]
* [[Ultra-low-sulfur diesel]]
* [[Vehicle emissions control]]

==References==
{{Reflist}}

==External links==
{{Wikisource|California AB 1493}}
* [https://dieselnet.com/standards/ Dieselnet pages on vehicle emission standards].
* [https://www.epa.gov/vehicle-and-fuel-emissions-testing EPA National Vehicle and Fuel Emissions Laboratory].
* {{cite web|url= http://www.epa.gov/otaq/cert/hd-cert/stds-eng.pdf |archive-url= https://web.archive.org/web/20000819054120/http://www.epa.gov/otaq/cert/hd-cert/stds-eng.pdf |url-status= dead |archive-date= August 19, 2000 |title=Emission Standards Reference Guide |date=19 August 2015 }}&nbsp;{{small|(141&nbsp;KB)}} for heavy [[duty]] and [[nonroad]] [[engine]]s.
* [https://www.fueleconomy.gov/feg/taxcenter.shtml Federal Income Tax Credits for Hybrids placed in service].
* [https://www.epa.gov/transportation-air-pollution-and-climate-change/accomplishments-and-successes-reducing-air EPA: History of Reducing Air Pollution from Transportation in the United States]

;EU
*  {{cite web|url= http://ec.europa.eu/environment/co2/9994/en.pdf |title=Directive 1999/94/EC of the European Parliament and of the Council of 13 December 1999, relating to the availability of consumer information on fuel economy and CO<sub>2</sub> emissions in respect of the marketing of new passenger cars |date=23 November 2023 }}&nbsp;{{small|(140&nbsp;KB)}}.
* [https://eur-lex.europa.eu/legal-content/EN/ALL/?uri=CELEX%3A31980L1268 Council Directive 80/1268/EEC Fuel consumption of motor vehicles].

{{Authority control}}

[[Category:Emission standards| ]]
[[Category:Air pollution]]
[[Category:Regulation of technologies]]

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