Across the world, complex social and market forces are driving the conversion of vast swaths of rain forests into pastureland, plantations, and cropland. Rain forests are disappearing in Indonesia and Madagascar and are increasingly threatened in Africa's Congo basin. But the most extreme deforestation has taken place in Brazil. Since 1988, Brazilians have cleared more than 153,000 square miles of Amazonian rain forest, an area larger than Germany. With the resulting increase in arable land, Brazil has helped feed the growing global demand for commodities, such as soybeans and beef.
But the environmental price has been steep. In addition to providing habitats for untold numbers of plant and animal species and discharging around 20 percent of the world's fresh water, the Amazon basin plays a crucial role in regulating the earth's climate, storing huge quantities of carbon dioxide that would otherwise contribute to global warming. Slashing and burning the Amazon rain forest releases the carbon locked up in plants and soils; from a climate perspective, clearing the rain forest is no different from burning fossil fuels, such as oil and gas. Recent estimates suggest that deforestation and associated activities account for 10-15 percent of global carbon dioxide emissions.
But in recent years, good news has emerged from the Amazon. Brazil has dramatically slowed the destruction of its rain forests, reducing the rate of deforestation by 83 percent since 2004, primarily by enforcing land-use regulations, creating new protected areas, and working to maintain the rule of law in the Amazon. At the same time, Brazil has become a test case for a controversial international climate-change prevention strategy known as REDD, short for "reducing emissions from deforestation and forest degradation," which places a monetary value on the carbon stored in forests. Under such a system, developed countries can pay developing countries to protect their own forests, thereby offsetting the developed countries' emissions at home. Brazil's preliminary experience with REDD suggests that, in addition to offering multiple benefits to forest dwellers (human and otherwise), the model can be cheap