Climate change is on pace to radically alter life on Earth. What to know.

Two terms – climate change and global warming – point to the same existential threat: Global temperatures have risen dramatically in about the past 150 years and scientists say they’re on pace to radically alter life on Earth in coming decades.

Temperatures on our planet have fluctuated based on natural processes many times in the past, but experts say this extraordinary run of warming is different.

Joel Shannon