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To learn the effects of acid rain on the environment, scientists purposefully raised the pH level of Lake #223 in Canada by pouring acid into it in 1977. Their reseach revealed that within seven years, all life in the lake had been killed. Graphics and clear explanations aid student comprehension of this fascinating and timely study. Part of "The Planet Under Pressure" series.
Journal Films, Inc., 1560 Sherman Ave., Ste. 100, Evanston, IL 60201, Phone: (847)328-6700, Toll-free: 800-323-9084, Fax: (847)328-6706, Email: info@agcmedia.com, URL: http://www.agcmedia.com
Available on VHS
Running time 20 minutes.
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