A. Production rates for synthetic petrochemicals skyrocketed from 1 billion pounds per year in 1940 to over 400 billion pounds per year in the 1980s. Approximately 70,000 chemicals are now in commercial production, many of which are used in household products. Many of these chemicals accumulate in the human body and cause cancer and other diseases, yet they have been inadequately tested or remain completely untested for their safety. Only about 600 of these chemicals are known to cause cancer.
Many chemicals used in household products are volatile.
That means they become gaseous at room temperature or are sprayed from an aerosol can or hand pump and thus take the form of microscopic particles that are easily inhaled. They can cause damage to the lungs or other organs as they are taken into the bloodstream. Because indoor pollutants are not as easily dispersed or diluted as outdoor pollutants, concentrations of toxic chemicals may be much greater indoors than outdoors. Not surprisingly, EPA experts say that indoor air pollution is one of the nation ' s most pressing personal health concerns. In the last few years consumers have discovered that some of the chemicals in household products whose safety was taken for granted are hazardous.