This glossary includes more than 300 solar terms, as well as hundreds of additional sustainable design and construction terms.
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 AllDefinition 1: A naturally occurring radioactive gas found in soils, rock, and water, which causes lung cancer, and is a threat to health because it tends to collect in homes, sometimes to very high concentrations.
Definition 2: A radioactive, colorless, odorless gas that occurs naturally. When trapped in buildings, concentration build up, and it can cause health hazards such as lung cancer.