Role of Ozone
Ozone is a gas. It is concentrated in layer 25-30 Km above the earth’s surface. Ozone acts as a shield, protecting the earth from the damaging effects of ultraviolet radiation from the sun..
It is thinning or complete loss of layer of Ozone .It is 10 to 50 km above the earth.
Ozone absorbs the electromagnetic radiation in the ultraviolet region. Thus ozone prevents these rays to reach earth. Ozone shield appear to be breaking down.This is matter of serious concern. A depletion of ozone above the Antarctic was observed by the British Antarctic Survey in 1977 and the first ‘hole’ discovered there in 1985 (a ‘hole’ is where ozone depletion is over 50 per cent). This hole, which appears each spring, develops when very low temperatures allow the ozone to be destroyed in a chemical reaction involving chlorine. The main sources of chlorine are:
The release of chlorofluorocarbons (CFCs), especially from aerosols, by humans into the atmosphere(a long-term effect)
From major volcanic eruptions (a short-term effect).
The first observed ‘hole’ over the Arctic followed the coldest-ever January of 1989.Since then depletion's have increased annually over northern Europe.
People are advised to use sunblocks and to limit exposure to direct sunlight. Here the Ozone {triatomic oxygen} is formed by the action of ultraviolet radiation on the oxygen
In the atmosphere. High level of ultra violet radiation can be harmful to animal and plant
Motor vehicle exhaust fumes create increasing amounts of ozone close to the earth’s surface. Ultraviolet radiation is responsible for sunburn and skin cancer, snow-blindness, cataracts and eye-damage, aging and wrinkling of skin, and reduced immunity to disease.
High asthma levels in children,have been linked to traffic pollution.
Fat people are more affected by Ozone in air
Exposure to the Ozone is known to cause a temporary drop in the lung function in many people. In a study body weight influenced Lung function after acute Ozone exposure. The study found that ozone response was greater in heavy persons.
What health, air pollution can damage, Asthma,Headaches,Rhinitis
nauseous, vomiting,eyes water, Eye Irritation Pharyngitis, ,Sore throat, Bronchitis , Dyspepsia, Breathlessness, Respiratory Problems, Conjunctivitis Abdominal Pain, Stomach ache,Epistemic,Depression
Oxygen Bars are supposed to improve health and well-being.
Oxygen bars started spreading in nineties in Japan, California & Britain. In trade fairs, health clubs and airports.. Now these are opening in France. These are being marketed as anti- stress, anti-fatigue, and anti-depression help. One of such bar has been opened in a beauty institute..The health inspectors are trying to determine the merits and demerits. Of sniffing O2. Some experts are of the opinion that the the effect is more psychological than technical.
The oxygen bars offer the sniffers up to 95 % of oxygen compared to 21% of atmospheric oxygen in the cities due to severe pollution.
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