In July, scientists with NASA’s Goddard Institute for Space Studies released a startling finding: Each of the first six months of 2016 were the warmest occurrences of their respective months in modern history. Then in mid-November, as higher temperatures continued around the globe, the World Meteorological Organization announced it was likely that 2016 would turn out to be the hottest year ever recorded. The new findings emphasize what science has increasingly documented in recent years: Climate change is already affecting the environment — and it is increasingly causing harm to human health.