From Michelangelo D'Agostino
Your special report on nanopollution contains a misleading caption (29 March, p 14). The use of multimillion-dollar clean-room facilities and protective masks and clothing doesn’t spring from the need to protect researchers from nanoparticles, but to protect nanoparticles from researchers. Stray dust, hair or moisture from a person can spell disaster for nanoparticles or even for conventional semiconductor materials.
Street, Somerset, UK
