The Paris Agreement is a legally binding international treaty on climate change. It was adopted by 196 Parties at the UN Climate Change Conference (COP21) in Paris, France, on 12 December 2015. It became effective on 4 November 2016.
Its overarching goal is to hold “the increase in the global average temperature to well below 2°C above pre-industrial levels” and pursue efforts “to limit the temperature increase to 1.5°C above pre-industrial levels.”
Net zero is an ideal state where the amount of greenhouse gases (GHGs) released into the earth’s atmosphere is balanced by the amount of GHGs removed. Decarbonization efforts are needed to reach net zero.