Today marks the 47th Earth Day. At this year’s high-level celebration at the United Nations headquarters in New York, the Paris Climate Agreement will officially be signed. Thirty days after its signing by at least 55 countries that represent 55 percent of global gas emissions, the agreement will take effect—committing countries to establishing individual targets for emission reductions with the expectation that they will be reviewed and updated every five years. While news reports of Earth Day 2016 will likely depict dancing in the streets, those who can look past the headlines will see a dire picture—one in which more...