Agent Orange vs. RoundUp: Understanding The Health Effects of Weed Killers In the 1960s, the United States started using herbicides with the chemical TCDD, tetrachlorodibenzo-p-dioxin, or more commonly know as Agent Orange, to kill vegetation in areas of Vietnam and part of Laos. The goal was to allow troops to flush out the enemy, as well … Continue reading RoundUp vs. Agent Orange: More Similar than You Think!