Summary: 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 integral to electric power and, eventually, a vast array of agricultural and technological products. Describing the growth of scientific awareness of...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2006
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Summary: 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...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2006