The Dam builders
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Contrasts and compares the effect of two kinds of dam-building - that done by beavers and that done by human engineers. Points out how man is damaging the ecological balance of nature whereas the beaver is not.
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- 16mm Filmography (legacy record) — title, year, creator, length, format, description, catalog record
Original permalink · Record added 2024-04-22 17:36:12