Despite the considerable uncertainty in the effects, 40% of the overall run of 2.9oC for the ECS shows an optimal warming below 2oC (Additional Figure 10). This proportion increases steeply with slightly higher warming targets. None of the cost-damage curves involve 2 degrees Celsius as economically optimal for the 4oC ECS. With an ECS of 2oC, up to 63% of the results of the uncertainty set correspond to the target of 2oC. Trump`s exit from the Paris accord will have an impact on other countries by cutting financial assistance to the Green Climate Fund.  The end of US funding of $3 billion will have a final impact on climate change research and will reduce society`s chances of meeting the Paris Agreement goals and omit U.S. contributions to future IPCC reports.   Trump`s decision will also affect CO2 emission space and carbon prices.  The withdrawal of the United States will also mean that the place where the global climate regime can be adopted will be accessible to China and the EU.  On June 1, 2017, U.S. President Donald Trump announced that the United States would stop participating in the 2015 Paris Climate Change Agreement and begin negotiations to reintroduce the agreement “on a level playing field for the United States, its businesses, its workers, their citizens, its taxpayers” or the formation of a new agreement.  In withdrawing from the agreement, Trump said that “the Paris agreement will hurt the U.S.
economy” and “permanently penalize the United States.”   Trump stated that the withdrawal would be consistent with his America First policy. Here`s a look at what the Paris agreement does, how it works and why it is so crucial to our future. The DICE version we use is DICE2013Rv2_102213_vanilla_v24b.gms that we abbreviate here and in the main text as DICE-2013. This version was the latest version of this search. Meanwhile, a new version of DICE, z.B. DICE2016R-091916ap.gms, was published by William Nordhaus. These two versions are similar in terms of analytical background21, but involve slightly different optimal temperatures (DICE-2016 implies an optimal temperature above 0.2 degrees Celsius, which occurs about 30 years later).