Implementation of the agreement by all Member States will be evaluated every five years, with the first evaluation in 2023. The result will be used as an input for new national contributions from Member States.  The inventory will not be national contributions/achievements, but a collective analysis of what has been achieved and what remains to be done. The main objective of the agreement is to keep the increase in the average global temperature at a level well below 2oC above pre-industrial levels, including by reducing greenhouse gas emissions. The agreement is different from the 1997 Kyoto Protocol, the last UNFCCC amendment, which was widely adopted, as no annex is established to reduce the liability of developing countries. On the contrary, emission targets have been negotiated separately for each nation and must be implemented voluntarily, so U.S. officials view the Paris agreement as an executive agreement rather than a legally binding agreement. This reversed the U.S. Congress` commitment to ratify the agreement.  In April 2016, the United States signed the Paris Agreement and adopted it by executive order in September 2016. President Obama forced the United States to pay $3 billion for the Green Climate Fund.
 The Fund has set a goal of raising $100 billion per year by 2020. The Paris Agreement on The Control and Reduction of Greenhouse Gas Emissions was at the heart of the 21st Conference of the Parties (COP21) of the United Nations Framework Convention on Climate Change (UNFCCC), held in Paris in December 2015. Although this event was heralded as a turning point in human interaction with the Earth`s atmosphere, it was only the first step in a long process to hold countries accountable for their emissions of carbon dioxide, methane and other greenhouse gases. Until Earth Day 2016 (April 22), 174 countries have signed the closing agreement for an official signing ceremony organized in New York by UN Secretary-General Ban Ki-Moon. Over the next 13 months, another 21 countries have signed and 147 have ratified it. The agreement came into force on November 4, 2016. “These agreements are as good as each country`s obligations,” says Light. President Trump initially announced his intention to withdraw from the agreement in the summer of 2017, shortly after taking office. At the time, he said, “From today, the United States will cease all implementation of the agreement,” including the federal policy to reduce greenhouse gas emissions and U.S.
contributions to the International Climate Fund for poor nations. President Obama was able to formally enshrine the United States in the agreement through executive measures because he did not impose new legal obligations on the country. The United States already has a number of instruments on the books, under laws already passed by Congress to reduce carbon pollution. The country officially joined the agreement in September 2016, after submitting its request for participation. The Paris Agreement was only able to enter into force after the formal accession of at least 55 nations representing at least 55% of global emissions.