If you see smog, you can probably assume the air quality is bad, but what you might not see in the air can be just as dangerous to your health.

“Asthma and allergies don't have to stop you from doing great things,” says United States Olympian Galen Rupp . Rupp should know as he's been battling asthma and allergies his whole life.

This warm winter weather is something to sneeze at. Because of the warm weather, many trees are pollinating early meaning the start of allergy season has come sooner than expected.

Before you step outside on a sunny day for a run, think about taking precautions for your health. Sure, you stretched, but did you check the day's ozone level?

The summer of 2011 is one for the record books. This hottest and driest summer in recent memory has led to many forest and home fires. These fires can lead to more asthma attacks and worsen respiratory conditions in those most sensitive in the population.