Paris Climate Agreement Updates: Progress and a Problem for U.S. Policy & the Future of the Agreement

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Progress
On April 22, 2016, Earth Day, at the Signing Ceremony at the United Nations Headquarters, the Paris Climate Agreement was signed by 175 countries-- more countries signed on the first day the agreement was open for signatures than had for any previous international agreement. This marks the first step toward ensuring that the Agreement enters into legal force as quickly as possible.  The agreement becomes operational when it is approved or ratified by 55 countries representing 55% of global greenhouse emissions.