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Water Pollution
Cash awards to informers on polluters - United States urges Iowa to use old
Mercury poison in the wilds.
J. Rademacher charges clean water delay doubled plant cost - cities along M
Iowa stream poisoned; all life is killed - Blue Creek, Walker.
Iowa appeals on pollution made by Governor Ray.
State to sue on pollution, Farmbest, Incorporated, Iowa Falls.
Find pollution in Grand Canyon.
Iowa group urges fight of Secretary Hickel's order imposed on Iowa.
Rational river-cleaning policy.
Pollution in Canadian river chain.
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