Earthwatch Radio was inspired by Wisconsin U.S. Senator Gaylord Nelson, the founder of Earth Day. Launched in 1972, it was the first radio program in the nation to concentrate on environmental news. When the last show aired 35 years later, this award-winning program had become the longest-running program of its kind.

A searchable archive of the program scripts from January 1, 1990, through May 22, 2007, five programs per week, is available here. Digital audio recordings of the programs dating back to September 22, 2003, are also available.