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Global warming tied to risk of weather extremes

Tuesday, July 10, 2012 | 7:22 p.m. CDT; updated 9:15 p.m. CDT, Tuesday, July 10, 2012

NEW YORK — Last year brought a record heat wave to Texas, massive floods in Bangkok and an unusually warm November in England. How much has global warming boosted the chances of events like that?

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