PERIODICALS
SCIENCE & TECHNOLOGY
ions-molecules of common atmospheric gases that have taken on a positive or negative electrical charge.
The effects of air ions on living matter (including bacteria, plants, and human beings) are readily apparent but not thoroughly under- stood, write Krueger, a biometeorologist, and Sigel, a psychologist, both of the University of California at Berkeley. It is known, for exam- ple, that depletion of ions in the air may increase susceptibility to respiratory infec...