SW: add info on Sierra Club work, references, internal & external articles
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'''David Bookbinder''' (Attorney, [[Paul Weiss]] Riskind Wharton & Garrison). Bookbinder served as Chief Climate Counsel for the [[Sierra Club]], from at least 2007 through 2009. While in this position, he discouraged efforts that would have had the [[Environmental Protection Agency]] limit greenhouse gas emissions under the [[Clean Air Act]] to such a degree bring atmospheric carbon dioxide levels back down to 350 parts per million.<ref>Joann Hari, [http://www.thenation.com/article/wrong-kind-green "The wrong kind of green",] "The Nation", March 22, 2010.</ref>