Researchers say that between 1980 and 1992, more than 1,000 square miles (2,500 square kilometers) of forest in Rondônia was lost each year. The beginning of the loss coincided with a 1979 decision by Brazil’s Program of National Integration to build roads in the forest and to offer cheap land for agriculture.
In recent decades, the center of deforestation in Brazil has shifted east to the states of Mato Grosso and Pará, where large tracts of land are being cleared for mechanized agriculture, rather than small farms. Even so, Brazil’s overall rate of deforestation has slowed, attributable in part to more rigorous enforcement against illegal deforestation and logging activities.
Bottom line: Two images were taken by the Landsat satellite in 1975 and in 2012 show deforestation in the Amazon rainforest.http://earthsky.org/