resident Barack Obama announced Wednesday that the U.S. has set a new goal to reduce emissions of greenhouse gases by between 26 percent and 28 percent over the next 11 years as part of a climate change agreement with China. The new target is a drastic increase from earlier in Obama's presidency, when he pledged to cut emissions by 17 percent by 2020. By contrast, Obama's counterpart, Xi Jinping, did not pledge any reductions by a specific date, but rather set a target for China's emissions to peak by 2030, or earlier if possible. Xi also pledged to increase the...