New Scientist: Human activities have turned the world’s third largest rainforest region into a tinderbox that climate change will ignite. So concludes a new study of fire in the forests of Sumatra and Borneo in Indonesia. Investigators examined the fire history of Indonesian forests by analysing half a century of visibility records at local airports. “During the late 1970s, Borneo changed from being highly fire-resistant to highly fire-prone during drought years,” says Robert Field, an …