lunes, 22 de noviembre de 2010

CONSECUENCIAS DE LA CAPA DE OZONO

The consequences are already significant and can become tragic. A considerable decrease in the ozone layer means a corresponding increase in the amount of hard ultraviolet radiation reaching the Earth's surface.For humans, the immediate consequence is an increase in melanomas or skin cancers. The latest statistics reveal that, for example, in U.S. there was an increase of 5 000 cases per year among a population which is around 220 million inhabitants.

 
The National Academy of Sciences of the United States has forecast a 10% reduction in stratospheric ozone could cause a 20% incidence of skin cancer.Excessive exposure to ultraviolet radiation is also associated with suffering from cataracts and other eye disorders and the increased occurrence of allergic dermatitis and toxic.It has been shown that the immune system is depressed by exposure to UV radiation of high frequency, making it especially vulnerable children and the elderly to viral and bacterial diseases.With respect to other living beings incidence can be as diverse as the sensitivity of different species in this type of radiation is not uniform.As an example may be mentioned that recent studies in the laboratory show that species such as tomatoes, corn, carrots or beets is exposed to radiation increase the susceptibility to pests.
It is predicted that in the long term will be severely affected phytoplankton which upset the food chain in oceans and seas with disastrous ecological effects, and medium-term population reduction yields significantly decrease the fishing industry.Among animal species, seriously affected the vision of mammals and can kill species such as anchovy, trout and others that are very vulnerable in their larval stage.It has been shown that various materials used in construction, communications, electrical equipment, as well as synthetic fibers, plastics, rubber and rubber experience a significant deterioration of their properties and premature aging from exposure to ultraviolet radiation.

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