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.   So if the obstructionists want to end up with me, we make them non-obstructionists. We`re all going to sit down together, and we`re going to get back to the deal. And we will do it well, and we will not close our factories, and we will not lose our jobs. And we will meet with the Democrats and all the people who represent either the Paris agreement or something we can do, much better than the Paris agreement. And I think the people of our country will be delighted, and I think the people of the world will be delighted. But until we did, we came out of the agreement. Since the Kyoto Protocol came into force, the Clean Development Mechanism has been criticized because, in most cases, it has not brought significant emission reductions or benefits for sustainable development.
 It has also suffered from low prices from Certified Emission Reductions (REFs), which has reduced project demand. These criticisms have motivated the recommendations of various interest groups who, through working groups and reports, have provided new elements that they hope to see in the MDS that will support their success.  Details of the governance structure, the terms of the project proposal and the comprehensive approach should be detailed at the conference of the parties to be held in Marrakech in 2016. [must update] Nearly 200 countries signed the agreement in 2015 and made national commitments to reduce greenhouse gas emissions. Each country has set its own goals, and many rich countries, including the United States, have also agreed to help the poorest countries bear the costs of climate change. The pioneering agreement reached in 2015 aims to limit global warming to a level “well below” 2 degrees Celsius above pre-industrial temperatures. But in June 2017, U.S. President Donald Trump announced that the United States – the world`s second-largest emitter of greenhouse gases – would pull out of the agreement. While the agreement has been welcomed by many, including French President Francois Hollande and UN Secretary-General Ban Ki-moon, criticism has also emerged. James Hansen, a former NASA scientist and climate change expert, expressed anger that most of the agreement is made up of “promises” or goals, not firm commitments.
 He called the Paris talks a fraud with “nothing, only promises” and believed that only a generalized tax on CO2 emissions, which is not part of the Paris agreement, would force CO2 emissions down fast enough to avoid the worst effects of global warming.  The authors of the agreement have built a time line for the withdrawal that President Trump must follow – which prevents him from irreparably harming our climate.