How climate change is affecting when, where and even whether people run

From weekend runners to Olympians, people are changing when, where and even whether they run as heat, wildfire smoke and smog make certain types of exercise dangerous.

How climate change is affecting when, where and even whether people run
A jogger looks toward a hazy sky blanketing Washington, D.C.

From weekend runners to Olympians, people are changing when, where and even whether they run as heat, wildfire smoke and smog make certain types of exercise dangerous.