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.   Although the slowdown and adjustment require more climate funding, adjustment has generally received less support and less private sector action.  A 2014 OECD report showed that in 2014, only 16% of the world`s financial resources were devoted to adaptation to climate change.  The Paris Agreement called for a balance between climate finance between adaptation and mitigation, highlighting in particular the need to strengthen support for adaptation from the parties most affected by climate change, including least developed countries and small island developing states. The agreement also reminds the parties of the importance of public subsidies, as adjustment measures receive less public sector investment.  John Kerry, as Secretary of State, announced that the United States would double its grant-based adjustment funding by 2020.
 The Paris Agreement was launched at the signing on April 22, 2016 (Earth Day) at a ceremony in New York.  After the agreement was ratified by several EU member states in October 2016, there were enough countries that had ratified the agreement to produce enough greenhouse gases in the world for the agreement to enter into force.  The agreement came into force on November 4, 2016.  The Paris Agreement is the world`s first comprehensive climate agreement.  In the end, all parties recognized the need to « prevent, minimize and address losses and damages, » but in particular any mention of compensation or liability is excluded.  The Convention also takes up the Warsaw International Loss and Damage Mechanism, an institution that will attempt to answer questions about how to classify, address and co-responsible losses.  Negotiators of the agreement stated that the INDCs presented at the time of the Paris conference were insufficient and found that « the estimates of aggregate greenhouse gas emissions in 2025 and 2030, resulting from planned contributions at the national level, do not fall into scenarios at 2oC at the lowest cost, but lead to a projected level of 55 gigatonnes in 2030. » and acknowledges that « much greater efforts to reduce emissions will be needed to keep the increase in the world`s average temperature below 2 degrees Celsius, by reducing emissions to 40 gigatonnes or 1.5 degrees Celsius. »  [Clarification required] Although the agreement has been welcomed by many, including French President François Hollande and UN Secretary-General Ban Ki-moon-moon , criticism has also appeared.