The Paris Agreement is a legally binding international treaty on climate change. It was adopted by 196 Parties at COP 21 in Paris, on 12 December 2015 and entered into force on 4 November 2016. Its goal is to limit global warming to well below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels. The Paris Agreement works on a 5- year cycle of increasingly ambitious climate action carried out by countries. Countries submit their plans for climate action known as nationally determined contributions (NDCs).