ozone depletion

(redirected from Ozone depletion theory)

ozone depletion

The ongoing reduction of ozone in the stratosphere. Ozone (O3) is present in 1 ppm in the upper stratosphere, and it absorbs virtually all of the UV radiation from the sun; increased rates of sun-induced malignancies (e.g., melanomas) have been attributed to the destruction of the ozone layer. Ozone depletion is caused by the release of chloride ions from CFCs (chlorofluorocarbons) after release from air conditioners, spray cans, and manufacturing plants that produce electronics and plastics. CFCs degrade in the atmosphere, release chlorine and cause ozone destruction, remain free, or react with ozone to form ClO (chlorine monoxide); O3 is being depleted at a rate of 4–5% per decade.
References in periodicals archive ?
The chair of the board of DuPont was quoted as saying that ozone depletion theory is "a science fiction tale.
By early 1994, Vice President Al Gore, a leading proponent of the ozone depletion theory, felt sufficiently unsettled over the questions being raised that he called Ted Koppel of ABC's Nightline to, as Koppel put it, "call our attention to the forces--political and economic--behind what he would regard as the antienvironmental movement.
Though science has largely discredited the ozone depletion theory, the policies it spawned are set in concrete, and no reversal is likely.