With the election of President Reagan, the Tocks Island Dam project was shelved. Udall also helped spark a cultural renaissance in America by setting in motion initiatives that led to the Kennedy Center, Wolf Trap National Park for the Performing Arts, the National Endowment for the Arts, the National Endowment for the Humanities, and the revived Ford's Theatre. Upon Udall's recommendation President Kennedy asked former U.S. Poet Laureate Robert Frost to read an original poem at his inauguration, establishing a tradition for that occasion. A pioneer of the environmental movement, Udall warned of a conservation crisis in the 1960s with his best-selling book on environmental attitudes in the United States, "The Quiet Crisis" (1963). In the book, he wrote about the dangers of pollution, overuse of natural resources, and dwindling open spaces. Along with Rachel Carson's "Silent Spring", The Quiet Crisis is credited with creating a consciousness in the country that led to the environmental movement. Udall was a staunch supporter of Rachel Carson and her work. Stewart Udall once stated, "Plans to protect air and water, wilderness and wildlife are in fact, plans to protect Man."  Udall also had the foresight, when he was Secretary of the Interior, to spearhead the use of NASA satellites to produce images of Earth from space for scientific research, leading to development of the Earth Resources Observation and Science (EROS) center at the U.S. Geological Survey. Over the course of more than forty years, that program mapped the Earth from space, showing the physical changes to the planet. In 1967, the National Audubon Society awarded Udall its highest honor, the Audubon medal. During the energy crisis in the 1970s, Udall advocated the use of solar energy as one remedy to the crisis. In October 1972, Udall published a seminal article in "The Atlantic Monthly", entitled "The Last Traffic Jam". The article contains arguments for the proposition that "less is more" and foresaw problems with U.S. transportation and energy policy and competition with emerging markets for scarce resources. In 1974, Udall, along with Charles Conconi and David Osterhout, wrote "The Energy Balloon", discussing the energy policies of the United States. After leaving government service in 1969, Udall taught for a year at the School of Forestry at Yale University as a visiting professor of environmental humanism. He later devoted his time to writing books and articles about environmental issues and to practicing law.