ocr: Vietnam is still counting the massive environmental cost ofthe Vietnam War. Seven million tons ofbombs were dropped, and the defoliant chemical Agent Orange was sprayed over 42 million acres. In addition to the bridges, - - industrial zones and irrigation works destroyed,50% of Vietnam's torests were seriously damaged and 5% wiped out. Continuing deforestation is now the major problem. Each year, 494,000 acres are lost, with consequential soil erosion and flooding.
