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 troposphere, which extends about seven miles out from the earth's su…
