A catalog of satellite images for studying how our global environment is changing. The Earth Observing System, a major element of Mission to Planet Earth, will launch Earth-orbiting satellites in the late1990s. Concise, objective, information on policy trends, scientific research, and industrial developments concerning global climate change, stratospheric ozone depletion, deforestation, and sustainable development. An ecosystem encompasses not only water, land, air and wildlife, it also includes the people who live there. The Great Lakes-St.
Lawrence ecosystem includes eight U.S. states and two Canadian provinces.