A pesticide is any substance or mixture of substances intended for preventing or destroying. The term pesticide also applies to herbicides, fungicides, and various other substances.  According to a survey, 80 percent of most people’s exposure to pesticides occurs indoors and that measurable levels of up to a dozen pesticides have been found in the air inside homes.   Many household products are pesticides: Kitchen, Laundry, Bath disinfectants and sanitizers, Products that kill mold and mildew, weed killer, insect repellents, flea and tick sprays, powders, pet collars, and some pool chemicals.  Pesticides can also be tracked in from the outside from contaminated soil or with dust that floats in.