Concentrations of stratospheric ozone have decreased significantly over the last two decades, resulting in detrimental impacts on humanity and the biosphere. In this presentation, Dr. Donald Wuebbles, professor at the University of Illinois, discusses the expectations for future levels of ozone, the attempts to prevent further effects on ozone, and the concerns that remain for ozone recovery.

Dr. Kenneth Strzepek of the University of Colorado provides an introduction to the "Greenhouse Effect" and its effects on the global water cycle. The talk focuses on the impacts of climate change on regional and local water supply and demand in the Colorado River Basin, which includes the Roaring Fork Valley. The lecture also includes a look at the impacts of climate change on society.