A number of chemical companies are supplying data to the Environmental Protection Agency so it can assess whether nanoscale materials used in their products may pose health risks. Scientific American reports that 13 companies, including BASF and General Electric, have provided data to the EPA, and another 17 are expected to do so. Some scientists worry that the tiny nanoparticles or carbon nanotubes could interact with human tissue, perhaps having an asbestos-like effect on the lungs.
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