OZONE

A molecule made up of three atoms of oxygen. Occurs naturally in the stratosphere and provides a protective layer shielding the Earth from harmful ultraviolet radiation. In the troposphere, it is a chemical oxidant, a greenhouse gas, and a major component of photochemical smog.

A reactive form of oxygen. In the stratosphere it acts as filter for ultraviolet radiation but is destroyed by CFCs and halons. At ground level it is produced by reactions between VOCs and NOx, and as a constituent of photochemical smog, it is an irritant and can cause breathing difficulties.

A kind of oxygen that has three atoms per molecule instead of the usual two. Ozone is a poisonous gas, but the ozone layer in the upper atmosphere shields life on earth from deadly ultraviolet radiation from space. The molecule contains three oxygen PARALLEL PATH FLOW As defined by NERC, this refers to the flow of electric power on an electric system's transmission facilities resulting from scheduled electric power transfers between two other electric systems. (Electric power flows on all interconnected parallel paths in amounts inversely proportional to each path's resistance.)