1.) Host Bruce Robertson talks with Dr. Eban Goodstein, professor of economics, about his recent discovery of the "Saturday effect", that more oil spills happen on Saturdays than any other day. 2.) Robertson discusses Professor Thomas Tornbenny's recent project to convert sugar beets into fuel. 3.) Robertson talks with Eve Hamilton of the Overseas Development Council about the need for a new General Agreement on Tariffs and Trade and the positive effects it could have on economic and environmental development. 4.) Kent Patterson reports on the effects of dams and irrigation ditches on the Rio Grande River on nearby ecosystems.