Discusses the chemistry of the stratosphere at mid-latitudes, the Antarctic phenomenon, and temporal trends in ozone levels. Includes equations, diagrams of the global distribution of ozone, and halogen growth projections. Concludes that studies of stratospheric ozone demonstrate that the global environment is fragile and is impacted by human…

Discusses the high school framework and standards developed by the National Science Teachers Association in the subjects of physics, chemistry, biology, and earth and space sciences. (MKR)