Rebecca Hersher - NPR News
This year there is a lot less Antarctic sea ice, a factor in predicting global sea level rise, than ever recorded before.
The natural climate phenomenon is marked by warmer ocean temperatures in the equatorial Pacific, which drives hotter weather around the world.
World leaders already have many options to reduce greenhouse gas pollution and protect people, according to the United Nations report.
Scientists and forecasters are trying to figure out how to talk about the connection between climate change and severe weather. It could have big impacts on how people think about global warming.
The Arctic is very sensitive to climate change. In the last 40 years, the region has warmed much more rapidly than the Earth as a whole, a new study finds.
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.