| http://www.w3.org/ns/prov#value | - Sen. John McCain, in an op-ed with Sen. Joe Lieberman, recently declared: ???The debate has ended over whether global warming is a problem caused by human activity. ??? There is now a broad consensus in this country, and indeed in the world, that global warming is happening, that it is a serious problem, and that humans are causing it.??? In a powerful commentary in this morning???s Washington Pos
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