In which of the following places is it more difficult to determine if there is pollution?

A. Aquifer
B. Stream
C. Ajr
D. Pond
Is the answer d?

9 answers

No.
http://www.google.com/#q=pollution+air

http://www.google.com/#q=pollution+stream

http://www.google.com/#q=pollution+aquifer
The answer is aquifer
IS IT B?
person is right its A
omg is it b or a
im picking a ill let you guys now if its right
yep its A
Yeah it's aquifer
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