Tropospheric ozone is mainly produced by photochemical reactions involving other pollutant gases, especially over large cities. ... CFC's have chemical and physical properties that make them valuable in industry. CFC's are and unreactive chemically. ... Increased UV-B will alter photochemical reaction rates in the lower atmosphere that are important in the production of surface layer ozone and urban smog." ... Chlorofluorocarbons and replacement substances also enter into the climate picture because of their radiative characteristics. ...

• Word Count: 1505
• Approx Pages: 6
• Grade Level: Undergraduate

Tropospheric ozone is mainly produced by photochemical reactions involving other pollutant gases, especially over large cities. ... CFC's have chemical and physical properties that make them valuable in industry. CFC's are and unreactive chemically. ... Increased UV-B will alter photochemical reaction rates in the lower atmosphere that are important in the production of surface layer ozone and urban smog." ... Chlorofluorocarbons and replacement substances also enter into the climate picture because of their radiative characteristics. ...

• Word Count: 1470
• Approx Pages: 6
• Grade Level: Undergraduate