Fires are raging across the world’s largest tropical rainforest as farmers, land-grabbers and loggers torch trees and clear land for crops or grazing. According to Brazil’s National Institute of Space Research, the number of fires detected by satellite in the Amazon region this month is the highest since 2010. Bowing to international pressure and a global outcry over the destruction of a vital resource in the fight against climate change, president Jair Bolsonaro authorised the deployment of Brazil’s armed forces to help combat blazes, with warplane dumping water on burning tracts of Amazon. Critics say the large number of fires this year has been stoked by Bolsonaro’s encouragement of farmers, loggers and ranchers to speed up efforts to strip away forest