Many allergy and asthma sufferers have first-hand experience encountering indoor air that exacerbates symptoms. Indoor air pollution has many sources, including cleaning products, fireplaces, and home fragrances. But what if your home itself was polluting your indoor air?

_This is exactly what has happened to thousands of homeowners whose homes were constructed with drywall imported from China, according to a recent New York Times article. Individuals like Bill Morgan, who moved into one such affected home in Virginia, have experienced nosebleeds and headaches from the persistent noxious fumes that filled their houses. The fumes are so strong, in fact, that they even cause the metal in the homes' interiors to corrode or turn black