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What is global warming? When we burn fossil fuels to run our cars, homes and industries, we produce increased amounts of carbon dioxide and other gases that persist in the atmosphere and trap heat. |  | Hot Topic Global warming isn’t just a parlour discussion anymore; it’s here and happening right now, and it’s a serious threat to human health.
|  | Hotter world cooks up storms Hurricanes like Katrina may be followed by even fiercer storms if we don’t put the brakes on human-induced global warming.
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