According to the World Health Organization, indoor air pollution—generated largely by inefficient and poorly ventilated stoves burning biomass fuels such as wood, crop waste and dung, or coal—is responsible for the deaths of an estimated 1.6 million people annually.
Ayon sa World Health Organization, indoor air pollution-generated pangunahin sa pamamagitan ng hindi sanay at hindi maganda ang maaliwalas kalan nasusunog biomass fuels tulad ng kahoy, crop ng basura at dumi, o karbon-responsable para sa pagkamatay ng isang tinatayang 1.6 milyong mga tao taun-taon.