People spend an average of 90 percent of their time indoors. Studies conducted by the Environmental Protection Agency (EPA) show levels of several common organic pollutants to be two to five times higher inside homes than outside. Many of these pollutants come from the volatile organic compounds (VOCs) released from household cleaning products. Indoor pollutants can be reduced by limiting the number of chemicals used indoors. By following three basic guidelines you can improve your indoor environment, save money and help conserve natural resources.