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With Copenhagen Summit Approaching, Leading Polluters US and China Undercut Hopes of Substantial Pollution Cuts

World leaders gathered at the United Nations on Tuesday for a one-day global summit on climate change. But with little on specifics and emerging signs the worlds biggest polluters will try to determine their own emissions reductions, poorer nations most threatened by global warming are warning theyre being left behind. We speak with award-winning New York Times reporter Andy Revkin, environmental activist Ted Glick, and Anna Pinto, an indigenous rights activist from India whos traveled to Pittsburgh to call on G-20 leaders to tackle global warming.