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Write: The Scientist, 400 Market Street, Suite 1250, Philadelphia, PA 19106 Email: letters@the-scientist.com Fax: (215)351-1143 Hereditary sterility for species eradication Re: "Precision Extinction."1 Traps, poison, epizooties, and other measures seem too crude in the face of so many genetic advances. What could be more specific than species-reproduction controls? This could be an i