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2 greenhouse gases on the rise worry scientists
Carbon dioxide is not the only greenhouse gas that worries climate scientists. Airborne levels of two other potent gases — one from ancient plants, the other from flat-panel screen technology — are on the rise, too.
And that has scientists wondering about accelerated global warming.
The gases are methane and nitrogen trifluoride. Both pale in comparison to the global warming effects of carbon dioxide, produced by the burning of coal, oil and other fossil fuels. In the past couple of years, however, these other two gases have been on the rise, according to two new studies. The increase is not accounted for in predictions for future global warming and comes as a nasty surprise to climate watchers.
By Seth Borenstein, Associated Press
Full Story: http://www.usatoday.com/tech/science/environment/2008-10-24-greenhouse-gases_N.htm
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