A leading exponent of the Global Environmental Monitoring System, Dr. Nelson gives a vivid account of the need for down to earth environmental policies.
 
An accomplished NASA astronaut-scientist, Dr. Nelson has been with the U.S. Space Program since 1978 and flew as a Mission Specialist aboard three Space Shuttle flights. These missions included the first on-orbit satellite repair in 1984. Dr. Nelson was a pilot of the first operational flight of the Manned Maneuvering Unit and the primary extravehicular crewman. Nelson also served on the crew of the flight of Discovery in September 1988, immediately following the loss of the Challenger, and was extensively involved in the rework of all crew procedures and the re-engineering of Space Shuttle components and software.