WASHINGTON (Reuters) - The U.S. Environmental Protection Agency on Thursday rejected 10 petitions challenging EPA's 2009 finding that climate-warming greenhouse gas emissions endanger human health and the environment.
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Non-profit TerraformOne held a design contest for ideas for creating productive green spaces in cities. Winners include plans to put seniors to work as farmers and a global system of levees.

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Much organically bound carbon is deposited on inland lake bottoms and Swedish researchers have shown in a new study in Nature that carbon retention by sediment at lake bottoms is highly temperature-sensitive and that a warmer climate would result in increased carbon dioxide emissions to the atmosphere. (Swedish Research Council release)
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