According to the U.S. Environmental Protection Agency (EPA), most people’s exposure to pesticides occurs inside homes and as many as a dozen pesticides have been found in the air indoors.

The amount of pesticides found in homes can be caused by contaminated soil or dust that floats or is tracked in from outside, stored pesticide containers, and pesticides applied indoors. Health effects can include irritation to eye, nose, and throat; damage to central nervous system and kidney; and increased risk of cancer. Symptoms may include headache, dizziness, muscular weakness, and nausea. Learn more from the EPA on Pesticides.