On October 5, 2016, when the agreement reached enough signatures to cross the threshold, U.S. President Barack Obama said, “Even if we achieve all the goals… we will only get to part of where we need to go. He also said that “this agreement will help delay or avoid some of the worst consequences of climate change.” It will help other nations reduce their emissions over time and set bolder goals as technology progresses, all under a strong transparency system that will allow each nation to assess the progress of all other nations.   Although the United States and Turkey are not parties to the agreement, as countries have not indicated their intention to withdraw from the 1992 UNFCCC, they will continue, as a UNFCCC Schedule 1 country, to prepare national communications and an annual inventory of greenhouse gases.  It will also allow the parties to gradually strengthen their contributions to the fight against climate change in order to achieve the long-term objectives of the agreement. When a member withdraws from the Fund, the Fund`s normal operations and operations are interrupted in its currency and the settlement of all accounts between the Fund and the Fund is carried out by appropriate agreement between the Fund and the Fund. In the absence of agreement, the provisions of Schedule J apply to the count. While the enhanced transparency framework is universal and the global inventory is carried out every five years, the framework must provide “integrated flexibility” to distinguish the capabilities of developed and developing countries. In this context, the Paris Agreement contains provisions to improve the capacity-building framework.  The agreement recognizes the different circumstances of some countries and notes, in particular, that the technical review of experts for each country takes into account the specific capacity of that country to report.
 The agreement also develops a capacity-building initiative for transparency to help developing countries put in place the necessary institutions and procedures to comply with the transparency framework.  On August 4, 2017, the Trump administration formally communicated to the United Nations that the United States intends to withdraw from the Paris Agreement as soon as it is legally entitled to do so.  The formal declaration of resignation could not be submitted until after the agreement for the United States came into force on November 4, 2019 for a three-year date.   On November 4, 2019, the U.S. government filed the withdrawal notice with the Secretary-General of the United Nations, custodian of the agreement, and formally withdrew from the Paris Agreement a year later, when the withdrawal came into effect.  After the November 2020 elections, President-elect Joe Biden promised to reinstate the United States in the Paris Agreement for his first day in office and renew the U.S. commitment to climate change mitigation.  The agreement stipulated that it would only enter into force (and thus become fully effective) if 55 countries that produce at least 55% of global greenhouse gas emissions (according to a list drawn up in 2015) 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.