Stuart Chase, John Hawkinson, and Nancy Campbell Hayes discuss the "Save the Trees Program". They discuss saving the trees in Hyde Park. Includes Studs Terkel reading Mike Royko's poem.

Richard Lewis discusses nuclear energy, the Joint Committee on Atomic Energy, pollution, and his book "Nuclear Power Rebellion".

Discussing corporate violence and power with lawyer Ralph Nader.

Discussing the book "Mosquito coast" with the author novelist Paul Theroux.

Noted Norwegian adventurer and ethnographer Thor Heyerdahl discusses his most recent book "The Tigris Expedition: In Search of Our Beginnings" in which Heyerdahl and a crew of 10 men built a reed boat in Iraq and sailed it through the Persian Gulf, around the Horn of Africa, to Pakistan and eventually the Red Sea. Their goal was to prove that the ancient peoples of Mesopotamia and the Indus Valley could have been in contact through marine trade and migration.

Jeanne Stellman discusses her book, "Work Is Dangerous to Your Health: A Handbook of Health Hazards in the Workplace and What You Can Do About Them," and workplace safety issues in a variety of industries. Topics of discussion include the importance of prioritizing health in the workplace and consulting workers on workplace safety issues, and industry responses to occupational hazards.

Captain Cousteau talks about his book and the environmental movement in the United States and elsewhere.

Interviewing George Wald, biologist and philosopher, on the hazards of pollution, the environment, and peace. Wald talks about his speech at MIT "A Generation in Search of a Future".

Interviewing Dr. George Wald, Professor of Biology at Harvard University, who often spoke on the social aspects of science, human ecology, and the environment.

Discussing health hazards in work environments and environmental pollution. Interviewing Dr. Bertram Carnow and Bob and Joan Ericksen.

Interviewing Dr. Bertram Carnow about environmental health, air pollution, and occupational diseases.

Both Bob and Joan Ericksen ask why is a school being built not only by two highways but right next door to a paint factory. They contend that the paint fumes can't be good for anyone to breath. Instead of asking their patients where they work, Dr. Carnow believes more doctors need to ask, "What do you do?", to determine if they're working with any hazardous materials that may harm their health.

Sam Lovejoy discusses the opposition to nuclear power, the Clamshell Alliance, politics, environmental concerns, and anti-nuclear sentiments and movements.