Abram Chayes, Professor of International Law at Harvard University, discusses the United States’ foreign relations with Nicaragua and the International Court of Justice, also known as the World Court.

Discussing the book "Who Owns America?" and interviewing the author Walter J. Hickel, who became Governor of Alaska and Secretary of the Interior.

Julie Nadelhoffer and Illinois naturalist May Theilgaard Watts discuss the changing landscape of America and the conflict between nature and development.

Discussing the green revolution and the "modern homestead" and interviewing Mildred Loomis. Mildred Loomis discusses the back to the land movement.

Discussing the green revolution and the "modern homestead" and interviewing Mildred Loomis. Mildred Loomis discusses the back to the land movement.

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

Dr. William Beecher, Chi Academy of Sciences, Dorothy Buell, member of Dunes council, Tom Dustin, head of Indiana Issac Walton League, and Thelma McVey, head of the Sierra Club Midwestern, discuss why the Indiana Dunes National Lakeshore must be saved, and the measures they are taking to do so.

Pete Seeger discuss music and his plan to build a sloop to sail on the Hudson River.

A homemaker, Angela Pieroni, has spent eight years fighting for the rights of everyone to breath clean air. Pieroni explains she's done with just complaining and being brushed aside. She wants to see national legislation against air pollution. Dr. Bertram Carnow said he's not sure how long we'll be around as a species. Carnow explained that perhaps two or three million people will have to die before authorities take air pollution seriously.

Biologist, natural historian, and author David Attenborough discusses his book and upcoming television series “Life on Earth.” The book, show, and this interview focus on discussing the evolution of life.