The heat removed from the indoor air during the summer can also be used to provide a free source of hot water.

Another 300,000 died because of indoor air of poor quality.

There are other things you can do to keep your indoor air clean.

We want Americans to know that a big part of "living green" is breathing clean, healthy indoor air.

He has written more than 100 scientific documents related to indoor air.

The particulates in the indoor air, he found, had dropped 90 percent.

And it's high time we paid attention to indoor air.

There are a number of sources that can foul indoor air.

Many companies are marketing products and services intended to improve the quality of your indoor air.

But you don't have to wait for research and regulation to clean up indoor air.