When it's time for spring cleaning, don't forget the air.

Spring is the time for new. As nature crawls out of its winter cocoon, we humans tend to do the same thing. And a big part of that ritual is the annual cleaning out of our homes. But as you're vacuuming, dusting and wiping down your possessions, don't forget one of the most important things in your home: the air you breathe. Every day, you take in about 3,000 gallons of air. Make sure each breath is as clean and fresh as it can be.