Rebecca Hersher - NPR News
For decades, it was impossible to say that a specific weather event was caused, or even made worse, by climate change. But advanced research methods are changing that.
Some ecosystems have already been irreversibly altered, scientists say. And climate change is wreaking havoc on human health.
New research suggests that the world's glaciers are disappearing more quickly than scientists previously estimated.
The U.N. has released the most comprehensive global climate science report ever. It is unequivocal: Humans must stop burning fossil fuels or suffer catastrophic impacts.
Scientists say humans must keep global temperatures from increasing more than 1.5 degrees Celsius. The World Meteorological Organization warns that number is looming.