Yes, But The Park Ranger Will Fine Him For It

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First Reagan proved right about trees emitting more greenhouse gases than cars & industry. Now the damned animals are fouling our water supply. Or, possibly, we have ridiculous standards.
That leaves scientists and environmentalists struggling with a more fundamental question: How clean should we expect nature to be? In certain cases, they say, the water standards themselves might be flawed, if they appear to forbid something as natural as wild animals leaving their dung in the woods.
So there's a new answer to the rhetorical question about a bear in the woods.