Some countries have different authorisation procedures depending on the nature of the international agreement. Thus, agreements of great political importance to the country (for example. B peace treaties) may require legislative approval, but other agreements can only be agreed by the executive. Iran, Iraq and Libya – all members of the Organization of Petroleum Exporting Countries (Opec) – and conflict-torn states such as Yemen and South Sudan have not ratified the agreement. Syria has become a signatory to the Paris climate agreement and is the only country in the world that has not supported the framework agreement on greenhouse gas emissions. 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.  “Despite the White House`s best efforts to roll back our country, it has not halted our climate progress over the past four years.” Although the agreement was reached in December 2012, countries must go through the adoption, signing and accession process before they enter into full force. In most cases, a country must obtain the approval of its national government to continue. This is the final stage of the process – ratification – that the United States and China have just completed. The Kyoto Protocol, the international agreement that preceded the Paris agreement, was also “under” the UNFCCC, although its provisions were largely followed by those of the Paris Agreement.
“We know that the UK and the EU, as well as the UN Secretary-General, are planning an event on 12 December, the fifth anniversary of the conclusion of negotiations on the Paris Agreement, where they will try to achieve more ambition,” said Andrew Light. 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.