MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Future Earth. Artwork of an arid future Earth caused by global warming. In a crack in the parched soil, fossils and remains of civilisation can be seen. Global warming could be caused by the greenhouse effect, where emissions of carbon dioxide and other gases cause the atmosphere to trap the Sun's heat. This could make Earth too hot for life.
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