The contributions that each country should make to achieve the global goal are defined by that country and are called national contributions (NDCs).  Article 3 requires that they be « ambitious », that they « represent progress over time » and that they be defined « with a view to achieving the objective of this Agreement ». Contributions are reported every five years and recorded by the UNFCCC secretariat.  Any other goal should be more ambitious than the previous one, called the « principle of progression ».  Countries can cooperate and pool their national contributions. The planned national contributions, promised at the 2015 Climate Change Conference, serve, unless otherwise specified, as the initial national contribution. Protesters gather near the Eiffel Tower in Paris, France, during the 2015 UN climate conference. The authors of the agreement set a timeline for withdrawal, which must be followed by President Trump, which mitigates him to irreparably harm our climate. The quality of each country on track to meet its obligations under the Paris Agreement can be continuously monitored online (via the Climate Action Tracker and the Climate Clock). Under the Paris Agreement, each country must define, plan and regularly report on the contribution it makes to controlling global warming.  No mechanism obliges a country to set a specific emissions target before a given date, but each target should go beyond the targets set previously. The United States formally withdrew from the deal the day after the 2020 presidential election, although President-elect Joe Biden said America would join the deal after his inauguration.
 3.  The agreement will enter into force if there are at least 55 countries that together account for at least 55% of global greenhouse gas emissions.    On 22 April 2016 (Earth Day), 174 countries signed the agreement in New York  and began to adopt it in their own legal systems (by ratification, acceptance, approval or accession). On 12 December 2015, the 196 participants agreed by consensus on the final global compact on reducing emissions under the greenhouse gas reduction approach. In the 12-page document , members agreed to reduce their carbon emissions « as quickly as possible » and to do their best to keep global warming « well below 2 degrees Celsius. »  During the debates, the Pacific island states, seychelles, but also the Philippines, whose existence is threatened by sea level rise itself, had strongly voted to set a target of 1.5°C instead of just 2°C.   French Foreign Minister Laurent Fabius said the « ambitious and balanced » plan was a « historic turning point » in the goal of reducing global warming.  However, others have criticized the fact that important sections are « promises » or goals and not firm commitments of countries.  The amount of NDCs set by each country sets the objectives of that country. .