It's confirmed; air pollution kills more people than other environmental risks. In 2012, 7 million people died from exposure to air pollution making it the single largest environmental health risk to humans. In regions where biomass is still used extensively for household cooking and heating, like South Asia, indoor air pollution is the number one risk factor by attributable burden of disease (Lim et al., 2012). More people die from IAP than from malaria, HIV, or lack of clean drinking water and sanitation.