Here’s what you’ll learn when you read this story:In humanity’s ambitious quest to limit global warming to 1.5 degrees Celsius compared to pre-industrial levels, scientists have relied on an estimated temperature rise of 0.2 degrees Celsius per decade from 1970 to 2015. A new study suggests that the past decade actually saw a 0.35 degrees Celsius increase, suggesting that global warming may be accelerating. On December 12, 2015, the world came together to tackle a Herculean climate task: limiting global warming to just 1.5 degrees Celsius compared to pre-industrial levels. But the world might need to contend with another unfortunate fact—global warming is actually accelerating. This is obviously worrying, since not only is the planet warming, but the rate at which it’s warming may be accelerating, complicating the timeline for addressing the climate crisis.