Lakes: Aging and Pollution

Duration: 540 ft.

Year Published: 1971

Creator: centef

Copyright: Registered 1Jan71 · MP21651 (Jul-Dec 1971) Copyright holder: Centron Corp., Inc

Complete Record: Features underwater photography and other techniques to explain the aging process of lakes. Examines plants, fish and animal life found in lake habitats. Investigates changing water quality and succession of organisms in lakes as they change from youth to middle age to old age and death. Emphasizes man’s impact in speeding the aging process.