Severe weather on a global scale was the topic of a United Nations conference in Paris. CBS' Mark Phillips covered the Intergovernmental Panel on Climate Change yesterday. ABC and NBC took their turns. ABC's Bill Blakemore called the scientists "unanimous" and the evidence "unequivocal." Hotter temperatures have now penetrated a mile deep in the oceans "warming currents that have for millions of years acted as a cooling system for the planet." For the increase in warming to level off by 2050 "drastic cuts in greenhouse gasses must begin now, in the next ten years." NBC's Dawna Friesen added that even if humans stopped burning carbon today there is enough in the atmosphere already that temperatures will continue to climb: "There is no rewind button."
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