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UN climate talks stumble as scientists raise alarm

University of Chicago professor Raymond Pierrehumbert traced global warming theory back to its roots in the late 19th century during a keynote lecture at the American Geophysical Union meeting in San Francisco this week. Starting with Svante Arrenhius’ initial calculation of the warming that could be expected from increased carbon dioxide levels in 1896, he moved through the “dark ages” of the early 20th century and into the modern era of climate science, beginning in the 1950s. Decades of work since then has refined and advanced the science, but the early results stand up remarkably well today. “We in climate science have earned a right to be listened to,” Pierrehumbert said. “The question is, ‘Is anyone actually listening?’” 

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