This document discusses various types of air pollution including smog, acid rain, and indoor air pollution. It notes that air pollution is caused by emissions from vehicles, power plants, and other sources which release gases and particles into the atmosphere. Specific pollutants mentioned are carbon monoxide, dust, and radon. The document also addresses how human activities like burning fossil fuels contribute to increased greenhouse gases and global warming, and discusses the health impacts and proper disposal of hazardous wastes.