During the Vietnam war, especially from 1965 to 1971, the US empire used many types of herbicides and defoliants to destroy us in terms of military and economy.
With this technology, soil and mud contaminated with dioxin (also known as Agent Orange) will be transferred into abutments, where experts will raise the temperature to the point
About 73 thousand cubic meters of dioxin contaminated soil and sediment at the Da Nang airport airport will be excavated, put into tanks and heated at 335 degrees Celsius to purify