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. This happened on October 5, 2016 and the agreement came into force 30 days later, on November 4, 2016. At the 2011 UN Climate Change Conference, the Durban Platform (and the ad hoc working group on the Durban Platform for Enhanced Action) were created to negotiate a legal instrument to mitigate climate change from 2020. The resulting agreement is expected to be adopted in 2015.  The Paris Agreement is the world`s first comprehensive climate agreement.  Recognizing that many developing countries and small island developing states that have contributed the least to climate change are most likely to suffer the consequences, the Paris Agreement contains a plan for developed countries – and others that are capable of doing so – to continue to provide financial resources to help developing countries reduce and increase their resilience to climate change.
The agreement builds on the financial commitments of the 2009 Copenhagen Accord, which aimed to increase public and private climate finance to developing countries to $100 billion per year by 2020. (To put it in perspective, in 2017 alone, global military spending amounted to about $1.7 trillion, more than a third of which came from the United States. The Copenhagen Pact also created the Green Climate Fund to mobilize transformation funding with targeted public dollars. The Paris agreement expected the world to set a higher annual target by 2025 to build on the $100 billion target by 2020 and create mechanisms to achieve this. The agreement is a massive redistribution of wealth from the United States to other countries. With a growth of 1%, renewable energy sources can meet part of our domestic demand, but with 3 or 4% growth that I expect, we need all forms of American energy available, or our country – (Applause) – will be seriously threatened by power cuts and power cuts, our businesses will often stop, and the American family will suffer the consequences in the form of lost jobs and a very low quality of life. The Paris Agreement, drawn up for two weeks in Paris at the 21st United Nations Conference of the Parties (COP21) on Climate Change (UNFCCC) and adopted on 12 December 2015 marked a historic turning point in the fight against global climate change, as world leaders representing 195 nations agreed on an agreement containing commitments from all countries to combat climate change and adapt to its impact.