Washington Post: The test of President Obamas seriousness about addressing climate change is not his pending decision on the much-debated Keystone XL pipeline. Its whether he effectively consigns coal-fired power plants one of the biggest sources of carbon emissions to the ashcan of history. Since his reelection, Obama has signaled a new focus on climate change. Some may still deny the overwhelming judgment of science, but none can avoid the devastating impact of raging fires, and crippling drought, and more...