| Summary: | Scientists may still be discussing what caused the disappearance of the once-dominant dinosaurs, but there is no doubt among any of 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 now face being overwhelmed by the elements. The denizens of Earth may have less than 10 years left to prevent global warming from getting out of control. If we fail, millions of lives will be wiped out before the end of this century. Our world leaders have been warned repeatedly that time is running out. Most acknowledge that there is a problem and make fine speeches, but no economic power is doing enough to avert disaster.
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