Scientists may still be discussing what caused the disappearance of the once-dominant dinosaurs, but there is no doubt amongst them what is causing the current round of mass extinctions. It is mankind. People have been cutting down forests and polluting water and land for centuries, but it is the burning of coal, oil and gas that has brought the planet to the brink of disaster. As ice melts, storms get more violent and deserts spread, our major cities face being ...
