The document discusses the main sources and types of air pollution including stationary sources, mobile sources, agricultural sources, and natural sources. It also lists some of the major air polluters in the area such as the Philippine Sinter Corporation and STEAG Power Plant. Additionally, it defines air pollution and lists the six criteria air pollutants regulated by the Clean Air Act which are ozone, sulfur dioxide, nitrogen oxides, particulate matter, carbon monoxide, and lead. Finally, it includes two graphs showing trends in air pollution levels from different regions around the world.