Freon was a refrigeration breakthrough in 1928. It took 45 years for scientists to recognize its dangers, and another 15 for the international community to enact a worldwide ban on all CFC gases. This program illustrates that long process of problem-solving and political action, focusing on the work of Nobel-winning chemists F. Sherwood Rowland and Mario Molina and how their discoveries led to the 1989 Montreal Protocol—which may well have prevented catastrophic depletion of the ozone layer. Interviews with Rowland, climatologist Robert Watson, and EPA official Stephen Anderson illuminate one of the most important environmental sagas of the last century. (30 minutes)

Tell a Friend! Your Name: Your Email: Your Friend's Email: Your Message: We respect your privacy and will not use your friend's address without permission. Item#: KEH36092 Copyright date: ©2006 DVD ISBN 978-1-4213-5514-6

Part of the Series : Late Lessons from Early Warnings 2: The Ongoing Need for Vigilance

DVD	$149.95
DVD + 3-Year Streaming	$224.93
3-Year Streaming	$149.95

Prices include public performance rights.
Only available in the US and Canada.

		Meltdown: A Global Warming Journey Despite widespread scientific acceptance of the global warming theory, it remains a highly contentious subject. This program studies divergent points of view contributing to the global warming debate, untangling a morass of political and scientific c...(more details)		DVD $169.95 DVD + 3-Year Streaming $254.93 3-Year Streaming $169.95
		Chemical Equations Filled with real-life demonstrations that support instructive written examples, this program reinforces the basic principles of solving equations for chemical reactions. A brief historical overview describes Marie and Antoine Lavoisier's establishmen...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Environmental Issues and Human Impact This video looks at urgent environmental concerns facing planet Earth and what people can do to repair the degradation humans have caused. Air and water pollution, the effects of pollution on health and the environment, deforestation and loss of wetl...(more details)		DVD (Chaptered) $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Acids and Bases Use this video to familiarize students with the properties of acids and bases. Beginning with an overview of how these two kinds of chemicals react to or neutralize each other, the program explores Arrhenius's ideas on ion release and Lowry and Brons...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Mysterious Poison: The History of PCBs They are now banned worldwide-but the toxins known as PCBs are not going away. This program explains how the compounds have almost irreparably polluted the globe and still threaten future generations. The film begins in 1927, when PCBs became integra...(more details)		DVD $149.95 DVD + 3-Year Streaming $224.93 3-Year Streaming $149.95

See additional titles in Ecology | Weather & Climate | Chemistry | Environmental Problems & Management