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.    At the 2011 UN Climate Change Conference, the Durban Platform (and the ad hoc working group on the Durban Platform for Enhanced Action) was established to negotiate a legal instrument for climate action from 2020. The resulting agreement is expected to be adopted in 2015.  18 id. art. 21. In the United States, President Obama`s administration considers the Paris Agreement to be a presidential agreement for the implementation of the convention and does not need to be ratified by the Senate. 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 the planned contributions at the national level are not covered by the least expensive scenarios of 2oC, but lead to a projected level of 55 gigatons in 2030.“ and acknowledges that „much greater efforts to reduce emissions will be needed to keep the global average temperature increase to less than 2 degrees Celsius, reducing emissions to 40 gigatonnes or 1.5 degrees Celsius.“  [Clarification needed] The agreement stated that it would only come into force (and therefore fully effective) if 55 countries responsible for at least 55% of global greenhouse gas emissions (according to a 2015 list) would ratify , approve, 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. The ratification by the European Union has achieved a sufficient number of contracting parties to enter into force on 4 November 2016. The EU and its member states are individually responsible for ratifying the Paris Agreement. There was a strong preference for the EU and its 28 Member States to simultaneously table their ratification instruments to ensure that neither the EU nor its Member States commit to commitments that belong exclusively to the other and there was concern that there was a disagreement on each Member State`s share of the EU-wide reduction target. just as Britain`s vote to leave the EU could delay the Paris pact.  However, on 4 October 2016, the European Parliament approved the ratification of the Paris Agreement and the EU tabled its ratification instruments on 5 October 2016 with several EU Member States.  The main international agreements on climate change are linked below. The full text of the treaty is linked and the UN treaty website contains details on participants and important data.