"As the president previously stated, the United States is withdrawing unless we can re-enter on terms they are more favourable for our country", the statement read. At the conference, Syria said it would sign on to the Paris climate accord.
The U.S. has become the only nation in the world to not participate in the Paris Climate Accord, an worldwide agreement to voluntarily lower carbon emissions in an effort to curb rising global temperatures.
"Syria's decision shows the breadth of support for the Paris agreement", Alden Meyer, of the Union of Concerned Scientists, told Reuters. Nicaragua initially claimed that it wouldn't sufficiently address climate change, but the country changed its tune and signed on last month.
"This should make the Trump administration pause and reflect on their ill-advised announcement about withdrawing from the Paris agreement".
On Oct. 23, Nicaragua announced it would join the Paris accord, despite its previous reservations.
"As if it wasn't already crystal clear, every single other country in the world is moving forward together to tackle the climate crisis, while Donald Trump has isolated the United States on the world stage in an embarrassing and unsafe position", an environmental NGO, the Sierra Club, relayed in a statement - criticising the United State's position. Some 25,000 scientists, envoys, lobbyists and environmental activists have descended on the city for two weeks to figure out how to turn the goals of the Paris accord into reality. However, due to the terms of the agreement, the USA can not fully withdraw until 2020.
The White House didn't immediately respond to a request for comment.
The U.N.'s weather agency said on Monday that this year is on track to be the second or third warmest since records began in the 19th century, behind a record-breaking 2016, and about 1.1 Celsius (2F) above pre-industrial times.
"This is part of a long-term warming trend", said WMO Secretary-General Petteri Taalas.
The WMO also said 2017 will be the hottest non-El Niño year ever recorded.