1. The World Health Organization reports that 99% of the global population breathes air with levels of pollution exceeding their guidelines, causing approximately 7 million deaths per year.
2. Air pollution comes from various sources such as burning fuels, crop or tree clearing operations, and wildfires. Particulate matter (PM 2.5) and gases like nitrogen dioxide and sulfur dioxide are particularly harmful.
3. To protect oneself from air pollution, individuals should limit exposure during periods of poor air quality by staying indoors or wearing masks. Indoor air quality can also be affected by common activities like cooking or burning incense. Air purifiers can help reduce indoor air pollution but have limitations in larger spaces and require users to be nearby for maximum effectiveness.