Pollution emissions from vehicles have increased considerably in recent years in many Brazilian cities, causing significant health problems. As a response, environmental standards for automobile pollution were implemented in 1988, and considerable reductions in emissions were attained....

The extent of deforestation in the Brazilian Amazon grew significantly in the last 20 years. Approximately 400,000 square km of tropical forest were cleared from 1978 to 1998. Land conversion to pasture and crop areas were the main sources of deforestation, though the contribution of logging...