Indoor air quality is the air quality within and around buildings and structures. Indoor air pollution is known to affect the health, comfort and well-being of building occupants. Poor indoor air quality has been linked to Sick Building Syndrome, reduced productivity and impaired learning in schools. According to the Occupational Safety and Health Administration (OSHA) of the US Department of Labour, poor indoor air quality can cause headache, fatigue, trouble concentrating, and irritation of the eyes, nose, throat and lungs. Indoor air pollution has a far greater impact on developing countries than it does on developed ones because fuel, such as wood, charcoal and animal dung, is burned inside homes for cooking and heating. Rarely is there proper ventilation to allow the pollutants to escape, so residents of these homes end up breathing in carbon monoxide and other dangerous contaminants. In developed countries, sources of air pollution incude; tobacco, radon and volatile organic compounds. volatile organic compounds create a variety of pollutants in indoor air. volatile organic compounds are carbon-containing compounds that are released by pretty much anything you can imagine - perfume, paint, plastic, household cleaners, adhesives, furniture, carpet, paper…even that nice 'new car smell' is really just the smell of toxic chemicals being released!