One clear day last spring, Katharine Hayhoe walked into the limestone chambers of the Austin City Council to brief the members during a special meeting on how prepared the city was to deal with disasters and extreme weather. A respected atmospheric scientist at Texas Tech University, the 43-year-old had been invited to discuss climate change, and she breezed through her PowerPoint slides, delivering stark news in an upbeat manner: unless carbon emissions were swiftly curbed..
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