Families are spending more than 90% of their time indoors.

The energy crisis of the 70's brought the indoor air crisis of the 90's. Now, studies show that the air inside your home may be five times more polluted than the air outside your home.

The term "sick building syndrome" becomes a part of the American vocabulary as a way to describe this disease of modern architecture.

Quoting Marilyn Chase from a December '98 Wall Street Journal article: "Wall to wall carpet, poorly ventilated fireplaces, kerosene heaters, mold and bacterial toxins, dust mites ... an almost endless collection of highly allergenic products have invaded our homes and we have sealed them in with deadly precision."

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