Great lakes, fragile seas [videorecording]

North America's freshwater seas have been subjected to decades of human abuse. Documents concurred groups attempting to repair past damage and confronting new threats to these waters. Shows how bodies of water affect lives of people. Shows the multifaceted aspects of the seas and other bodies o...

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Nhiều tác giả của công ty:	National Geographic Society (Washington, D.C.), WQED (Television station : Pittsburg, Pa.)
Tác giả khác:	Seamans, Joe
Resource Type:	Visual Material
Ngôn ngữ:	English
Được phát hành:	Washington, D.C. The Society c1991.
Những chủ đề:	Great Lakes > Conservation of Environmental protection. Conservation of natural resources > Citizen participation. Conservation of natural resources.