The Paris Agreement, or Paris climate accord and Paris climate agreement, is an agreement within the United Nations Framework Convention on Climate Change (UNFCCC) dealing with greenhouse gas emissions mitigation, adaptation and finance starting in the year 2020.

In the Paris Agreement, each country determines, plans and regularly reports its own contribution it should make in order to mitigate global warming. There is no mechanism to force a country to set a specific target by a specific date, but each target should go beyond previously set targets.

In 2017, President Donald J.Trump withdrew the United States from the agreement, causing widespread condemnation in China and the European Union.

The Paris Agreement was opened for signature on 22 April 2016 (Earth Day) at a ceremony in New York. After several European Union states ratified the agreement in October 2016, there were enough countries that had ratified the agreement that produce enough of the world's greenhouse gases for the agreement to enter into force. The agreement went into effect on 4 November 2016.

According to a study published in "Nature" in June 2016, current country pledges are insufficient to meet the Paris Agreement goal of keeping global temperature rise "well below 2 °C".

More Info: en.m.wikipedia.org