| http://www.w3.org/ns/prov#value | - change policy and low-carbon fuel standards. digital.library.unt.edu/ark:/67531/metadc26141/ Global Climate Change: Three Policy Perspectives The 1992 U.N. Framework Convention on Climate Change requires that signatories, including the United States, establish policies for constraining future emission levels of greenhouse gases, including carbon dioxide (CO2).
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