Word: hac
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Blue is used for crop destruction primarily, acting very effectively against grasses and rice. Blue contains derivatives of arsenic compounds, and the HAC is now working out laboratory tests which should be able to detect traces of these compounds in human hair; that way, the interaction of the herbicides with the human food chain should be clarified, and some of the long-lasting effects of the herbicides may become known...
Mangrove forests cover about 3,000 square kilometers of South Vietnam, along the coast of the Delta in the South and to the southwest of Saigon. About half, 1,400 square kilometers, has been sprayed with herbicides, as estimated by the HAC. The HAC preliminary report discusses some of its findings...
...mangrove destruction. Villagers in the south relied on the mangroves as a major source of wood for fuel and charcoal. Mangrove-lined waterways provide food and nursing grounds for fish and crustaceans, too. Mangroves are active photosynthesizers and fix carbon into an organic form the fish can use. The HAC was unable to estimate the magnitude of this function but suggested that its impact on the fishing industry deserved study...
Hardwood forests of some kind cover nearly 90 per cent of South Vietnam. Mature forests of economically valuable hardwood cover about 50,000 square kilometers. Through 1969, the HAC estimates 13,500 square kilometers were sprayed, with a third of that being sprayed more than once...
...From the HAC preliminary report: "Approximately one-fifth of South Vietnam's merchantable hardwood forests have been sprayed, including many of the oldest and most valuable stands. Aerial inspection of forests in a wide are north of Saigon extending from the Cambodian frontier in the west to the South China Sea on the east showed more than half of the forest to be very severely damaged. Over large areas, most of the trees appeared dead and bamboo had spread over the ground. A danger in this is that the invading bamboo species may be essentially worthless and very expensive...