Concise, 15-minute explanation of greenhouse effect, how scientists understand the greenhouse effect and its causes and effects with certainty, areas where additional research is recommended, and the nature of the greenhouse effect challenge and solutions to act now, not later.
Hearing before the Subcommittee on Toxic Substances and Environmental Oversight of the Committee on Environment and Public Works, United States Senate, Ninety-Ninth Congress, First Session, December 10, 1985.
