After decades of rancorous debate, only a handful of the most doctrinaire die-hards still dispute the idea that human activity is heating up the planet. all the signs seem to point that way: storms have become more intense and weather patterns more erratic; the past decade has been by far the hottest on record; and the rise in temperature has been greatest in polar regions and around cities. These facts dovetail ominously well with the theory that carbon dioxide (CO 2), released by burning coal, oil and gasoline for heat, electricity and transportation, is trapping excess energy from the sun. Global...
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