The legally binding international treaty on climate change i.e. the Paris Agreement is has been signed and has committed to adopt by 196 Parties (196 countries) at COP 21 in Paris, on 12th December 2015. This treaty came into force on 4th November 2016. Paris Agreement aims to limit the global warming below 2, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.
Implementation of the Paris Agreement requires economic and social transformation, based on the best available science. The Paris Agreement works on a 5- year cycle of increasingly ambitious climate action carried out by countries. By 2020, countries submit their plans for climate action known as nationally determined contributions (NDCs). As many countries failed to submit and the submitted NDCs were also not strong enough to cut emissions at COP 26, that happpened on glasgow decided to “revisit and strengthen” the country's 2030 targets by the end of 2022 that align with Paris Agreement temperature goals.
NDCs
In their NDCs, eachccountries sumit their climate actions they will take to reduce their carbon emissions. Countries set targets for mitigating the greenhouse gas emissions that cause climate change and for adapting to climate impacts.
Go through the link to see the latest list countries who have submitted NDC.