The United States is moving to list emperor penguins as a threatened species based on new evidence that colonies are imperiled by shrinking sea ice.
The Amazon rainforest is the world’s carbon sink. Parts of it now release more carbon than can be absorbed.
Scientists say the gradual shrinkage of a carbon sink is a disturbing new signal that Earth may be reaching a tipping point on climate change.
The world’s largest coral ecosystem is under threat from climate change.