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sci.esa.int
| | blogs.esa.int
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| | Follow ESA's mission to Comet 67P/Churyumov-Gerasimenko
| | www.esa.int
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| | Reconstructing Philae's trajectory
| | blogs.esa.int
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| | Follow ESA's mission to Comet 67P/Churyumov-Gerasimenko
| | co2coalition.org
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| By Gregory Wrightstone People should be celebrating, not demonizing, modern increases in atmospheric carbon dioxide (CO2). We cannot overstate the importance of the gas. Without it, life doesn't exist. First, a bit of history: During each of the last four glacial advances, CO2's concentration fell below 190 parts per million (ppm), less than 50 percent of our current concentration of ... Read more