The United States officially withdrew from the Paris Agreement to fight climate change on Wednesday. Leaders from around the world approved the agreement in 2015 at a conference in the French capital. For more than two years, American President Donald Trump talked about withdrawing from the treaty. Last year, the Trump administration announced the U.S. decision to withdraw. However, the results of the presidential election could decide for how long. Trump’s main opponent in the vote, former Vice President Joe Biden, has promised to rejoin the climate agreement if he is elected. More than 180 countries remain committed to the 2015 Paris accord.