Nicaragua and Syria were the final two countries to sign on to the climate accord, leaving the U.S.as the only United Nations-member state not supporting the agreement.
The Paris agreement aims to combat global warming by gradually reducing emissions of greenhouse gases such as carbon dioxide and methane, which come from the burning of fossil fuels such as oil, coal and natural gas.
President Donald Trump, who has expressed doubts that man-made greenhouse gas emissions are the prime cause of global warming, announced in June that he meant to pull out and instead promote USA coal and oil industries. "The U.S.'s stark isolation should give Trump reason to reconsider his ill-advised announcement and join the rest of the world in tackling climate change".
Despite signing up to the Paris climate accord Syria has not been invited to a summit on the pact in the French capital in December, the French foreign ministry said today.
The U.S. may be No. 1, but that's also the loneliest number. Syria had been the last nation, other than the US, not to be a part of the agreement.
President Trump announced in June he would be withdrawing from the Paris climate change agreement, calling it "unfair". Nicaragua, which was one of the last holdouts, in September announced it would join the accord.
This makes the United States the only country on the planet not a part of the climate deal. However, due to the terms of the agreement, the US can not fully withdraw until 2020.
The White House didn't immediately respond to a request for comment.
At the meeting Monday, the United Nations' weather and climate agency, the World Meteorological Organization, announced 2017 will definitely be among the three hottest years on record. The other big feature on McKenna's personal Twitter account is never-ending happy stories about renewable energy and government programs to address climate change, so much so that you would never know the government she represents claims the world faces an imminent, existential threat from global warming in which hundreds of millions of people will soon die.