1. The document discusses various types of air pollution including emissions from vehicles, industrial processes, and combustion of fossil fuels which release nitrogen dioxide, ozone, particulate matter and sulfur dioxide. 2. Sources of indoor air pollution are also mentioned including bacteria, molds, dust, and emissions from building materials and consumer products. 3. The health effects of air pollution are respiratory problems, allergies, and increased risk of cancer while environmental effects include acid rain, ozone depletion, and global warming. Strategies to improve air quality include developing cleaner fuels and technologies, and implementing emissions regulations.