Enlarge / Coal plants at the end of the line? (credit: Ryan Pyle / Getty Images) Chinese President Xi Jinping used his speech to the United Nations General Assembly to announce a major new step towards controlling global emissions. After reiterating his own country's climate pledges, Xi said that China would start making it easier for other countries to keep emissions in check: new support for renewable energy projects and an end to construction of coal plants. China finances a lot of infrastructure projects in developing economies as part of its foreign policy efforts; these often have the side benefits of involving Chinese companies and engineers.