William Williams <Tab/>Page 1 <Tab/><Tab/><Tab/>The Atmosphere and Air Pollution: Mexico City The atmosphere of the earth consists of four main layers of various gases that surround the earth. The main components of the atmosphere are nitrogen, oxygen, argon, carbon dioxide, neon and helium respectively (Earths Atmosphere). <Tab/>The innermost layer is the …showed first 75 words of 702 total…

…showed last 75 words of 702 total…of Wisconsin, (n.d.). Chemical of the week-ozone. Retrieved Jun. 19, 2005, from Science Fun Web site: http://scifun.chem.wisc.edu/chemweek/ozone. Ronoke College, (n.d.). Sources of air pollution. Retrieved Jun. 18, 2005, from Air Pollution Control Technology Web site: http://www.roanoke.edu/Chemistry/JSteehler/HNRS301/Pollution/AirPollution-Sources.html. Department of Energy, (n.d.). Mexico environmental issues. Retrieved Jun. 18, 2005, from eia Country Analysis Briefs Web site: http://www.eia.doe.gov/emeu/cabs/mexenv.html.