| http://www.w3.org/ns/prov#value | - The U.S. is No. 2 in carbon emissions.Hansen, it is now at Columbia University, said it is not enough for environmentalists to simply oppose fossil fuels and promote renewable energy.They are cheating themselves if they keep believing this fiction that all we need is renewable energy such as wind and solar, Hansen told the AP.The joint letter says, The time has come for those who take the threat
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