EarthTalk: What is 'nanotechnology'?

Dear EarthTalk: What is "nanotechnology"? I've heard that nanoparticles are already in consumer products, yet we haven't really studied their potential health impacts. (Dan Zeff, San Francisco)

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<p><a href="http://www.physorg.com/news162480951.html">EarthTalk: What is 'nanotechnology'?</a></p> <p> Dear EarthTalk: What is "nanotechnology"? I've heard that nanoparticles are already in consumer products, yet we haven't really studied their potential health impacts. (Dan Zeff, San Francisco)</p>