Can States and Cities Really Uphold the Paris Climate Deal?

Governing: Early this month, President Trump formally announced his intention to pull the U.S. out of the Paris climate accord, angering environmentalists across the globe. But within hours, a slew of governors, mayors and companies pledged to uphold the landmark deal's mission.

The governors of California, New York and Washington state -- which represent 10 percent of the country's greenhouse gas emissions -- created the United States Climate Alliance, which at last count had grown to include 12 states and Puerto Rico.

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