It is no secret that U.S. waters contain noxious substances like DDT, lead and mercury. The mystery is how to remove them. The pollutants are dissolved in such microscopic particles that they cannot be sifted or scooped out by chemical or mechanical means.
Researchers have lately pondered the fact that aquatic organisms (fish, plankton, diatoms, insect larvae) concentrate the dissolved pollutants in their bodies. That fact led Robert Metcalf, head of the University of Illinois' zoology department, to a fascinating idea: Why not use certain insects to sop up the pollutants?
Breaking the Cycle....
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