Volcanoes trigger greenhouse effect

Posted by Kate Taylor
Earth's repeated flip-flopping between greenhouse and icehouse states over the past 500 million years may have been caused by volcanoes at particular spots where enormous amounts of carbon dioxide are released into the atmosphere.
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GreenPeace criticizes iPad's large carbon footprint

Posted by Aharon Etengoff
GreenPeace has expressed its concern over the iPad's rather potentially large carbon footprint.
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