The language of the agreement was negotiated by representatives of 197 parties at the 21st UNFCCC Conference of the Parties in Paris and agreed on 12 December 2015.   The agreement was signed at UN Headquarters in New York from 22 April 2016 to 21 April 2017 by states and regional economic integration organisations parties to the UNFCCC (convention).  The agreement stated that it would only enter into force if 55 countries that produce at least 55% of global greenhouse gas emissions (according to a list drawn up in 2015) ratify, accept, approve or adhere to the agreement.  On April 1, 2016, the United States and China, which together account for nearly 40% of global emissions, issued a joint statement confirming that the two countries would sign the Paris Climate Agreement.  175 contracting parties (174 states and the European Union) signed the agreement on the first day of its signing.   On the same day, more than 20 countries announced plans to join the accession as soon as possible in 2016. The ratification by the European Union has achieved a sufficient number of contracting parties to enter into force on 4 November 2016. Seven other states signed the Paris Agreement but did not ratify it. Pakistan has joined more than 100 countries in ratifying the pioneering pact, which respects stricter greenhouse gas rules. Nearly 100 countries that negotiated the agreement have yet to ratify it. The United Nations Climate Change Conference, held two years ago in Paris, which was also an important step in seeing how previous agreements had unfolded, decided to secure commitments from countries that could limit global warming to a level that could be addressed.
Pakistan reduced a very sad figure at this conference, although the delegation was led by the Prime Minister. However, one of the approximately 350-word pagers he made heard as Pakistani intent had nothing to say. Since November 2020, 194 states and the European Union have signed the agreement. 188 countries and the EU, which account for about 79% of global greenhouse gas emissions, have ratified the agreement or have joined the agreement, including China and India, the countries with the first and third CO2 emissions among UNFCCC members.    All 197 UNFCCC members have signed or joined. Pakistan on Thursday ratified the Paris Agreement on climate change, which requires almost all countries to reduce greenhouse gas emissions from global warming in order to counter the most radical effects of global warming. On June 1, 2017, U.S. President Donald Trump announced that the United States would withdraw from the agreement.  Under Article 28, the effective withdrawal date of the United States is the fastest possible date, given that the agreement entered into force in the United States on November 4, 2016. If it had decided to withdraw from the UNFCCC, it could be informed immediately (the UNFCCC came into force in 1994 for the United States) and come into force a year later.
On August 4, 2017, the Trump administration officially announced to the United Nations that the United States intends to withdraw from the Paris Agreement as soon as it has a legal right to do so.  The formal declaration of resignation could only be submitted after three years of implementation of the agreement for the United States in 2019.   The Paris Agreement is an agreement within the framework of the United Nations Framework Convention on Climate Change (UNFCCC) that deals with the reduction, adaptation and financing of greenhouse gas emissions from 2020.