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Remove card http://theatre-trevise.com/stmap_69fb0.html?valproic.levitra.bupropion.piroxicam clindamycin oral liquid dosage Soot and methane have a limited-term effect on climate because they stay in the air for a relatively short time. Soot remains in the atmosphere for only a couple of weeks, with methane hanging around for about a decade. On the other hand, the greenhouse gas carbon dioxide can linger in the air for more than 1,000 years, the study says.
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