The chemistry and physics of the terrestrial atmosphere, with emphasis on the operation of major anthropogenic influences, such as ozone depletion, the greenhouse effect and tropospheric systems, such as photochemical smog. Other planetary atmospheres will be discussed in the context of their implications for the evolution of the earth’s atmosphere. [Offered: W] Prereq: CHEM 254 or EARTH 421, CHEM 350(Cross-listed with CHEM 305)