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        3-12

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        Auditory, Visual

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        NOVA | Grand Canyon: Conservation and Development

        Since its completion in 1963, the Glen Canyon Dam on the Colorado River has helped meet society's demands for irrigation, electricity, and flood control. This video segment documents research that tracks the impact of dams like Glen Canyon on their rivers' ecosystems. Dams transform both upstream and downstream environments in ways that both harm and help local ecology. This only increases the complexity of the issues surrounding these massive structures.

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