outdoor air pollution

Energy services are required for health; insufficient access to energy services constitutes a health risk. But energy supplies that are dirty, dangerous, and environmentally disruptive can lead to disease, injury, and death. About 2.8 billion people, mostly in developing countries, rely on solid fuels (wood, coal, charcoal, and dung) for household energy needs. Some 3.5 million people die prematurely each year from direct exposure to household air pollution from solid fuels.