Final answer:
According to the World Health Organization, air pollution is responsible for 2.4 million deaths each year. Both outdoor and indoor air pollution contribute to these deaths, with indoor air pollution being a major concern in developing countries.
Step-by-step explanation:
According to the World Health Organization (WHO), air pollution is responsible for 2.4 million deaths worldwide each year. This includes both outdoor and indoor air pollution. It is important to note that the severity of air pollution and its impact on human health may vary depending on the region and the level of exposure.
Outdoor air pollution can be assessed using the Air Quality Index (AQI), which measures the level of pollutants in the outdoor air. High levels of AQI indicate increased health risks, especially for individuals with pre-existing respiratory conditions such as asthma.
Indoor air pollution is another major concern, particularly in developing countries. It is estimated that more than 1.6 million deaths per year are caused by indoor air pollution. Solid fuels, such as biomass and coal, used for household cooking and heating contribute to indoor air pollution, particularly among women and children.