11. Many chemicals that are potentially toxic or harmful to
the
environment have maximum allowable concentration levels set
by government legislation. (a) If the chemical is dangerous,
should the limit be zero? (b) Is a zero level theoretically
possible? (c) Is a zero-level measurable? (d) If a nonzero limit
is
set, in your opinion, how should this limit be chosen?
11. Many chemicals that are potentially toxic or harmful to the environment have maximum allowable concentration levels
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11. Many chemicals that are potentially toxic or harmful to the environment have maximum allowable concentration levels
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