Air pollution is one of the primary challenges that humanity is facing today. Dust and pollution are choking our cities and there appears to be no respite in sight. Long-term exposure to polluted air has been associated with various health issues such as respiratory problems and even cancer. What is even more worrying is that air pollution exists inside our homes. According to the U.S. Environmental Protection Agency, indoor air can be 2-3 times more polluted than outside air. Indoor air pollution is caused by things like mould, household products, tobacco smoke, carbon dioxide, radon, carbon monoxide, formaldehyde, lead, asbestos,.