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A · B · C · D · E · F · G · H · I · J · K · L · M · N · O · P · Q · R · S · T · U · V · W · X · Y · Z   entire Web this site radon A naturally occurring radioactive gas found in many types of soil, rock, and water. It can migrate into most buildings. Studies have linked high concentrations of radon to lung cancer. Related categories    • BASIC SCIENCE Also on this site: Encyclopedia of Science Transport Concepts & Designs (partner site) BACK TO TOP