The two presidents of the two main polluter countries, Obama and Xi Jinping have finally ratified Paris climate deal during the G20 summit in Hangzhou, China. The diplomatic tensions which tied China and United States have been set aside to find a joint plan to reduce greenhouse gases emissions. China and United States are considered to generate nearly 40 percent of the world’s emissions and these countries together can work to bringing the agreement into force worldwide. The deal will take legal force when it will be ratified by 55 signatories producing 55% of the global emissions and the Chinese and US ratification pushed the total to 40%. The Paris agreement main goals are to keep global temperature increase below 2 degrees, achieve a balance of energy source, limit greenhouse gases and invest 100 billion dollars in climate finance for developing countries by 2020. During the past years China and United States have set a different climate policy reflecting their different stages of economic development. USA promised to reduce its emission by 26-28% in the 2025 while China promised to stop the growing level of its emission by the 2030. This ratification is also important to encourage other countries to take part in the Paris climate deal as soon as possible. UK Secretary of State for Energy and Climate Change said government’s commitment on climate change and clean energy has not changed after Brexit. The gLAWcal Team POREEN project Wednesday, 28 September 2016 (Source: BBC news) This news has been realized by gLAWcal—Global Law Initiatives for Sustainable Development in collaboration with University Institute of European Studies (IUSE) in Turin (Italy) which is beneficiary of the European Union Research Executive Agency IRSES Project “Partnering Opportunities between Europe and China in the Renewable Energies and Environmental iNdustries” - POREEN, Work-package 4.