My Ozone

Copenhagen–Even under this city’s low, leaden skies, at least one thing remained clear as leaders from 193 countries gathered to negotiate climate agreements: one ton of carbon dioxide emitted in the U.S. has the same effect as one ton emitted in India or anywhere else. That simple truism is part of a huge body of data pointing to humanity’s effect on climate, and for most negotiators, the weight of that evidence seems to have crushed any doubt they may have felt in the wake of the 1,000-plus e-mails and computer code stolen from the University of East Anglia’s Climatic Research Unit (CRU).

The theft made headlines as “Climategate” in November, and many private correspondences among scientists became public. Climate contrarians and politicians, including Senator James M. Inhofe of Oklahoma, have claimed that the messages show that climate science was far from settled, that “tricks” were used and that researchers hid unfavorable data.

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