The Aging of lakes

Series: Environmental Studies Series

Duration: 18

Genre: Educational | Historical | Nature

Year Published: 1988

Creator: ENCYCLOPEDIA BRITANNICA EDUC. (FILM

Format: 16mm

Color: Color

Sound: sound

Description: Traces the aging process of lakes, showing how man's interference with the environment causes critical changes in the natural ecology. Describes efforts to preserve and restore damaged lakes. Revision of 1971 title., Traces geological and ecological factors of normal aging of lakes, stressing how man is speeding up the natural process by indiscriminately disposing fertilizer, sewage, and industrial waste. Shows present methods of restoring lakes by removing solids and adding oxygen to the lakes. Explains the process of the natural aging and eventual death of lakes, called eutrophication. Links man's environmental interference with the changes in lakes. Investigates current efforts to retard eutrophication and the preservation and restoration of our lakes.

Complete Record: Traces the aging process of lakes, showing how man's interference with the environment causes critical changes in the natural ecology. Describes efforts to preserve and restore damaged lakes. Revision of 1971 title., Traces geological and ecological factors of normal aging of lakes, stressing how man is speeding up the natural process by indiscriminately disposing fertilizer, sewage, and industrial waste. Shows present methods of restoring lakes by removing solids and adding oxygen to the lakes., NOTE: Two (or more) records have been merged together to create this data.