LIV Mexico will be played this week at around 7,800 feet of elevation. Here's how the pros are preparing to play at the high ...

Your body needs time to adjust to the higher elevation, so avoid intense physical activities, such as hiking or skiing, on ...

Perhaps nowhere on the globe are these two waves of migration converging more starkly than in Mexico City, a vast urban ...

A new report finds people in the Denver metro area are breathing some of the most ozone-polluted air in the U.S.

By 2050, the region is expected to grow by 600,000 people. Roughly 163,000 of that increase will be within the city of ...

The city of Tucson, Arizona, sits on America’s southern border, surrounded by the cactus-strewn landscapes of the Sonoran ...

People in the Denver metro area are breathing some of the most ozone-polluted air in the U.S., the latest "State of the Air" report from the American Lung Association found.