Washington Post: This week, tens of thousands of climate activists, negotiators and policy wonks are in Paris to finalize the next phase of international climate policy. Many doubt that an agreement can be reached, or that any plausible agreement will make any meaningful progress on the increasingly real problem of climate change. It is extremely unlikely that Paris will be either a resounding success or an abysmal failure. More likely, it will serve as a useful next step toward a more ambitious set of both national...