Amazon forest fires: what is causing them and how is Brazil responding?
A sharp increase in the number and scale of forest fires in the Amazon is threatening the world's largest rainforest. The fires have a variety of causes, but are principally the result of illegal logging and agriculture in the Amazon region. Brazilians are demanding action, especially after smoke darkened São Paulo one afternoon. The Brazilian government has struggled to respond effectively. Plus, learn the English phrase "up to the task."