U.S. President Donald Trump has announced that he is pulling the United States out of the Paris Climate Treaty.

The U.S .withdrawal from the Paris Climate Agreement could, by the end of the century, raise global temperatures by 0.3 degrees Celsius, a UN World Meteorological Organization (WMO) official said on Friday. Head of the Department of Atmospheric Research and Environmental Protection at WMO, Deon Terblanche said that it was the worst possible scenario as there are no climatic models that would serve as a measure of the potential consequences of the decision that was announced on Thursday by U.S.

President Donald Trump.

The worst scenario

"It is an estimate of an additional temperature increase of 0.3 degrees Celsius and it is a direct consequence of The American withdrawal from the agreement," Terblanche said at a regular briefing in Geneva. The purpose of the signing of the Paris Accord in 2015 was to force nearly 200 countries around the world to limit global warming to less than two degrees Celsius by 2100, largely by committing to reducing carbon dioxide emissions and other toxic compounds generated by fossil fuel combustion.

The UN called Trump's decision a great disappointment for global efforts to reduce greenhouse gas emissions and improve global security. When asked if Trump was right when he said the U.S.

would still be the world's most environmentally aware country in the world, Terblanche said his decision was complex and it would take some time to analyze.

He added that he is concerned on a personal level, but not as an organization. He also said that every day, they work closely with U.S. scientists at all levels, including many leading world experts.

Two years ago, scientists warned that by increasing the temperature by only one degree Celsius, the consequences of warming the planet would easily be felt: droughts, floods, devastating cyclones and tornadoes and the disappearance of coral reefs. But +2 degrees celsius will have a particular effect on ocean levels and their acidification, which is a question of survival for many island states.

Juncker's reaction

Donald Trump's decision to withdraw his country from the Paris Climate Agreement has caused a number of fierce reactions. European Commission President Jean-Claude Juncker said, "If the president leaves the Paris agreement in the next few hours or days, then it is the duty of Europe to say, 'it does not go that way.'"