China’s output of greenhouse gases could peak in 2025, five years earlier than it has promised, meaning that the world’s largest emitter may be able to quicken the pace of cuts in coming decades, according to a new paper published today by the London School of Economics...China has already undertaken to peak its emissions of climate-changing gases by 2030...based on current policies and new measures aimed at shrinking the country’s carbon footprint and cutting the use of coal, 2025 is a more likely date when emissions might peak...China would need to lower its emissions sharply after GHGs have peaked, rather than a “plateau” that would lock in high levels of emissions...Leaders of the G7 on Monday attempted to build trust with countries most at risk from climate change by promising a range of measures such as ditching fossil fuels completely by the end of the century and providing insurance to the most vulnerable nations.