Season 11 · Episode 9 of 15
Aired Feb 8, 1971
The Great Lakes
Mon, Feb 8, 1971
0 of 15 watched this season
Immediate implementation of pollution control in our Great Lakes is urgently needed if we are to preserve our most vital waterway.
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Airs
Mon, Feb 8, 1971
Show
The Nature of Things
635 episodes
Episode
S11 · E9
in The Nature of Things