New York Times: Burdened by low expectations, snarled by endless traffic congestion and shunned by President Obama, the United Nations Conference on Sustainable Development ended here as it began, under a shroud of withering criticism. The antipoverty organization CARE called the meeting “nothing more than a political charade,” and Greenpeace said the gathering was “a failure of epic proportions.” The Pew Environment Group was slightly more charitable. “It would be a mistake to call Rio a failure,” the group said,…

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