The document discusses various sources and effects of air pollution. It focuses on nitrogen oxides, sulfur oxides, ground-level ozone, and particulate matter as major air pollutants. Sources discussed include transportation, industry, power plants, and residential heating. Effects on both human health and the environment are outlined, such as respiratory illnesses, acid rain, smog, and global warming. The document then examines specific issues related to air pollution in Bulgaria and Mexico City, and provides recommendations for reducing air pollution through alternatives to automobiles, cleaner fuels and technologies, better city planning, and individual lifestyle changes.
![No x (NO, NO2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://www.sbg.ac.at/ipk/avstudio/pierofun/mexico/air-scan/nox.jpg](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)