A、It has been decreasing largely since 1988. B、It has been out of control for two decades. C、It has been improved in 2004. D、It

Deforestation in the Brazilian Amazon dropped nearly 46%from August 2008 to July 2009—the biggest annual decline in two decades, the government said Thursday. (30)Analysis of satellite imagery by the National Institute for Some Research shows an estimated 7008 square kilometers of forest were cleared during the 12-month period, the lowest rate since the government started monitoring deforestation in 1988.
      The numbers have been falling since 2004. when they reached a peak of 27000 square kilometers cleared in one year, according to the space research institute. The government credited its aggressive monitoring and enforcement measures for the drop, as well as its promotion of sustainable activities in the Amazon region, an area in northern Brazil the size of the US west of the Mississippi River. (31)But Paulo Gustavo, environmental policy director of Conservation International, said a main factor is the drop in world prices for beef, soy and other products that drive people to clear land for agriculture in the rainforest.
      (32)Satellite images from the space research institute have allowed government inspectors to increase enforcement, the government said. The Brazilian Environment Institute reported confiscating about 230 000 cubic meters of wood,414 trucks and tractors and 502000 hectares of land linked to illegal deforestation activities from August 2008 to July 2009. Amazon deforestation causes 75% of Brazil’s greenhouse gas emissions, according to the National Inventory of Greenhouse Gases.