The President of the United States of America, Joe Biden, signed today, just hours after taking office, a decree on the country's return to the Paris Agreement, after Trump abandoned the climate treaty in 2017.
"We are going to fight climate change like we have never done before," said Biden, in the Oval Office.
On November 04, the United States formally left the Paris Agreement, a global pact signed five years ago with the aim of halting the threat of catastrophic climate change.
The move, long announced by Donald Trump and triggered by his administration a year ago, further isolates Washington from the world, but has no immediate impact on international efforts to curb global warming.
There are 189 countries that remain committed to the 2015 Paris Agreement, which aims to keep world average temperatures rising “well below” two degrees celsius, ideally less than 1,5 degrees celsius, compared to pre-industrial levels. Another six countries signed but did not ratify the pact.
Scientists say that any increase above two degrees Celsius can have a devastating impact in large parts of the world, raising sea levels, causing tropical storms and aggravating droughts and floods.
The Paris Agreement requires countries to set their own voluntary targets to reduce greenhouse gases, such as carbon dioxide. The only mandatory requirement is that nations accurately report their efforts.
The USA is the second largest emitter in the world, after China, of gases that retain heat, such as carbon dioxide, and its contribution to reducing emissions is considered important.