Former White House adviser David Gergen on Thursday ripped President Donald Trump's decision to withdraw from the Paris climate agreement as "one of the most shameless acts in our history."
"Today, we walked away from the rest of the world," Gergen – who served Presidents Richard Nixon, Gerald Ford, Ronald Reagan, and Bill Clinton – told Erin Burnett on CNN. "It's a terrible setback for the planet.
"We represent, as a country, 4 percent of the world's population, but we represent about a third of all the excess carbon-dioxide warming the planet.
"We're the largest contributor of carbon dioxide in the world," Gergen said. "As we walk away from that, it's grotesquely irresponsible."
He noted "the nations that are going to pay greatest price for global warming are the poorest countries of the world.
"Yet, they've contributed the least to global warming," Gergen told Burnett, "and for us to walk away from that is immoral."
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