
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, CA Nanotechnology makes use of minuscule objects-whose width can be 10,000 times narrower than a human hair-known as nanoparticles. Upwards of 600 products on store shelves today [...]