(Poll created May 7, 2010)
Submitted by editor

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Imagine a regulation Olympic size swimming pool. How much of a substance would it take in the water to make it have one part per billion?

One molecule
One drop
One teaspoon
One tablespoon
One cup
One gallon
A bathtub full
A tanker truck full
There is no way to answer that question.
Is this another ARSENIC question?
I don't own a swimming pool
I can't imagine a swimming pool
Depends on the substance.
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