ozone shield

ozone shield

the layer of ozone that hangs in the atmosphere from 20 to 40 miles above the surface of the earth and protects the earth from excessive ultraviolet radiation. Some experts claim that the manufacture of various chemicals, such as chlorofluorocarbons used as propellants in aerosol sprays, and the effects of high-flying jet aircraft are destroying this protective layer and allowing excessive amounts of ultraviolet radiation to penetrate the earth's atmosphere, thus subjecting humans to increased dangers of skin cancer and other health problems. Some chemistry experts and federal health officials also claim that an additional threat comes from nitrous oxide in nitrogenous fertilizers rising into the atmosphere and reacting unfavorably with the ozone shield. The ozone shield is implicated in certain health problems that affect some air travelers. See also ozone sickness.
References in periodicals archive ?
They stressed that getting rid of the 13 different ozone depleting substances (ODSs) including hydrochlorofluorocarbons (HCFC) and Chlorofluorocarbons (CFC) is inevitable to protect the ozone layer or ozone shield, which protects all sorts of the life on earth and environment from adverse impacts of ultraviolet (UV) rays or radiation of the Sun.
USA], June 28 (ANI): The restoration of the globe's protective ozone shield may be delayed by three decades if fast-rising emissions of a chemical used in paint strippers and pharmaceuticals is not restricted, warns a study.
The latest recipients are: In Glass Design in Nerang, ABs Honey at Capalaba; Esk Veterinary Services in Esk; Tomelle Pty Ltd in Toowoomba; Macadamias Australia in Bundaberg; Footsmart Podiatry in Nambour; Turf Green in Capalaba; DeKing in Ormeau; Ozone Shield in Slacks Creek; Brisbane Automatic Gate Systems in Cleveland; and Crossweld Fabrication in Cairns.
With the ElemMate's help, Evie is able to repair the ozone shield and create an oasis in the Sahara Desert.
Concentration of Ozone within the protective ozone shield is decreasing, while levels in the air we breathe are increasing.
Besides the issues cited in the title, he covers Earth's ozone shield, acid rains on Canadian-US relations, caribou in the oil patch, the US-USSR science agreement, human rights and the environment, and fishing in the donut hole.
Suffice it to say, change is occurring and the experts blame it on a thinning of the ozone shield caused by earth's inability to re-digest its carbon dioxide.
The same event would have destroyed the planet's protective ozone shield and thus killed many land and marine plants.
The bad news was the discovery that four new man-made chemicals, which are not covered by the 1987 treaty, could pose a new threat to the ozone shield.
Dermalogica's Environmental Control System skincare products contain botanicals such as lemon, fumitory and fumaric acid which create an anti- ozone shield for the skin, counteracting reactive ozone before it causes harm.
The crises are also familiar: the buildup of greenhouse gases, acid rain, tropical deforestation, loss of biodiversity, depletion of the stratospheric ozone shield, population growth, and soil loss.