António Guterres, the United Nations secretary general, called climate change “the defining issue of our time.” Want climate news in your inbox? Sign up here for Climate Fwd: , our email newsletter. Warning of the risks of “runaway” global warming, the United Nations secretary general, António Guterres, on Monday called on global leaders to rein in climate change faster. “If we do not change course by 2020, we risk missing the point where we can avoid runaway climate change,” Mr. Guterres said at United Nations headquarters in New York. “Climate change is the defining issue of our time, and we are at a defining moment,” he said. “Scientists have been telling us for decades. Over and over again. Far too many leaders have refused to listen.” His remarks came with countries around the world far short of meeting the goals they set for themselves under the 2015 Paris accord […]