Democratic presidential nominee Joe Biden, joined by vice presidential nominee Sen.
The US formally withdrew from the landmark climate agreement on Wednesday, after Trump announced his intention to pull out in 2017.
"We remain committed to working with all USA stakeholders and partners around the world to accelerate climate action, and with all signatories to ensure the full implementation of the Paris Agreement", they added. "And in exactly 77 days, a Biden Administration will rejoin it", Biden, who would take the presidential oath on January 20, tweeted.
The 77-year-old former Vice President, who is now projected ahead in the ongoing vote count in the USA presidential election, vowed to rejoin the Paris Agreement, the world's most prominent climate change agreement.
The Trump administration formally submitted notification to the United Nations to officially start the USA withdrawal process from the Paris Agreement in November 2019, after making the decision to leave in July 2017.
However, a report last month by the group America's Pledge found that even without help from Washington, action from cities, states and businesses would still make it possible for the U.S. to cut emissions by 37% by 2030. The administration formally served notice to the United Nations one year ago on Nov 4, 2019. However, terms of the Paris Agreement- no country could leave the agreement until three years from the date of ratification.
Biden has called climate change and global warming "an existential threat to humanity" and that the USA has a "moral obligation to deal with it". As Rachel Cleetus, policy director of the climate and energy program at the Union of Concerned Scientists said the decision to exit the Paris Agreement "leaves the United States globally isolated in its defiance of scientific realities".
At present, 189 countries have ratified the accord, which aims to keep the increase in average temperatures worldwide "well below" 2 degrees Celsius (3.6 degrees Fahrenheit), ideally no more than 1.5C (2.7 F), compared to pre-industrial levels. "Every tenth of a degree counts", he said.
Biden, on the other hand, has made tackling climate change, one of the most important issues to the left wing of the Democratic Party, a central part of his campaign.
There are already signs that market forces are starting to tip the energy balance from fossil fuels to renewables, but the transition has far to go.