Both children and adults are vulnerable to and may be severely affected by exposure to chemicals, hazardous waste, and other environmental hazards. The Federal Environmental Protection Agency estimates that human exposure to indoor air pollutants can be 2 to 5 times and up to 100 times higher than outdoor levels. Children, workers, teachers, janitors, and other staff members spend a significant amount of time inside school and other institutional buildings and are continuously exposed to chemicals from cleaners, waxes, deodorizers, and other maintenance products.