Biden signed the executive order on his first day in office
The United States returned to the Paris climate agreement just 107 days after withdrawing from it.
The U.S. formally joined the agreement on Friday, nearly a month after President Joe Biden informed the United Nations of his intention to return.
Biden signed the corresponding executive order on his first day in office, reversing the decision of his predecessor, Donald Trump.
The Trump administration announced its withdrawal from the Paris Agreement in 2019, but because of the terms of the agreement, the decision did not take effect until November 4, 2020, the day after the election.
U.N. Secretary-General António Guterres said Thursday that America’s official return was “very important in itself,” as was Biden’s announcement that the U.S. would begin providing climate assistance to poorer countries again, as it had promised in 2009.