Translation per [1]:
Because of the distorted Viet Cong propaganda, Nam is worried about the defoliation chemicals used by the government. Dear Friend, what if the defoliation chemicals cause any damage to human beings, animals, land and water? Hello Nam, how are you? The defoliation chemical is used for the purpose of drying trees and striping off their leaves. It does not harm human beings, animals, land or water at all. As for me, don’t I look strong and healthy? Every day, because of my work, I have to breathe the defoliation chemicals, and as you can see, I am not a sick man. Your explanation sounds plausible, but what would happen if our crops are damaged? If by misfortune, your crops are damaged by the defoliation chemicals, the government will indemnify you... Now, I finally understand and I am no longer concerned about the defoliation chemicals. From now on, like everyone else, Nam remains calm and will not listen to the distorted Viet Cong propaganda.