President Obama last night reasserted his power to act on climate change without Congress, using a trip to China to announce new U.S. emissions-reduction obligations that he said could be achieved under authorities he already has. Obama pledged that the United States would cut its heat-trapping emissions to between 26 and 28 percent below 2005 levels by 2025. His announcement -- which came together with a new promise by China to cap its own emissions no later than 2030 -- is the first and perhaps most significant U.S. contribution toward an international climate agreement to be finalized in Paris next year (ClimateWire, Nov. 12).
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