This course introduces the basic concepts of environmental chemistry and natural ecosystems. The structure of the atmosphere and the important photochemical reactions occurring in the troposphere and the stratosphere, as well as the consequences of the ozone layer depletion, the continuous increase of carbon dioxide emissions and acid rain, are discussed. The basic concepts of limnology and aquatic chemistry are introduced. Eutrophication and water pollution by trace metals are also studied. Pollution by organic compounds is discussed using soils as examples. Some techniques of wastewater treatment and pollution remediation are discussed. PREREQ: CHMI 1202, 1032 or 1007. cr 3. This course is not a credit for students enrolled in the chemistry or Biochemistry program.