Presidential climate envoy John Kerry vowed on Friday that the U.S. would take aggressive steps to reduce its carbon emissions as the nation officially rejoins the Paris climate accord.
Under the agreement, some 195 countries set their own voluntary emissions-reduction targets. The goal is to prevent average global temperatures from rising more than 2 degrees Celsius compared with pre-industrial levels.
Former President Donald Trump withdrew the country from the pact four years ago. But President Joe Biden, on his first day in office last month, notified the United Nations the U.S. would rejoin. That became official Friday.