Greenhouse gases
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EPA zeroes in on aircraft greenhouse emissions
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Deep cuts in greenhouse gases needed by 2050 to slow global warming: UN
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NASA satellite on quest to measure carbon dioxide
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NASA satellite focused on global warming, CO2 levels
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CO2 level in Northern Hemisphere hits record high 400 ppm: 'Time is running out,' warns UN
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Climate change could compromise basic human nutrition, study finds
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Ocean acidity eating through shells of sea snails, warns NOAA
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Did EPA play politics with the environment? GOP calls dirty play
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Antarctic once had climate like the coast of California, study shows
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Odds very much against global warming being due to natural factors, scientists say
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Supposedly 'safer' synthetic gases replacing ozone-destroying CFCs could be a climate risk factor
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NASA says new satellite will measure CO2 emission levels, help humans deal with climate change
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