Answer: By 2017, 195 countries signed and 147 ratified, between developed and underdeveloped countries around the world.
Step-by-step explanation:
The Paris Accord is a global commitment to climate change and sets targets for reducing greenhouse gas emissions. For this agreement to enter into force, it was necessary for countries representing around 55% of greenhouse gas emissions to ratify it. On December 12, 2015, the agreement was signed after several negotiations, entering into force on November 4, 2016.
Among the agreements reached by the countries, one suggests that every five years governments voluntarily communicate mechanisms for reviewing their contributions so that targets can be raised. Developed countries are at the forefront of the agreement and should set numerical targets to be met for greenhouse gas emissions. Underdeveloped countries, however, need to increase their efforts to continue to achieve the proposed goals.