As large parts of the Amazon burn, weather experts are warning that rainfall is unlikely to put out the fires in the coming weeks. The Amazon is the world’s largest rainforest. Brazil’s National Space Research Institute studies deforestation -- the clearing or removal of trees from the area. It reports that the number of fires has risen by 85 percent to more than 77,000 in the past year. That is the most since the research center began keeping records in 2013. The fires are not limited to Brazil. At least 10,000 square kilometers of land are burning in Bolivia, near its border with Brazil and Paraguay. Brazil’s government has deployed troops and military airplanes as part of firefighting efforts.