We all live on the land under the rays of warm sun, but if all we know about the effects of these rays on the human body?
All life on earth depends on the energy of the sun.That's ultraviolet and infrared radiation are the source of this precious energy.However, exposure to ultraviolet radiation on living organisms often leads to an inevitable disturbance structures of nucleic acids and proteins, and as a consequence, leads to cell death.
Nature itself has created protection - Earth's ozone layer, which serves as a barrier to harmful UV rays.In the air, at an altitude of 20-50 km contains a large amount of ozone, which creates a kind of shield that protects the biosphere and humanity.
The human body is able to defend itself at the expense of the synthesis of dark pigment (melanin) that we call not only as a tan.But at the same time in the spring, when the skin contains a small amount of melanin, a person can not remain a long time in the sun: skin may redden quickly, and in a few hours can rise overall body temperature and a headache.
Everyone has long known that scientists observe the systematic destruction of the ozone layer.In the atmosphere, ozone has decreased significantly, moreover, was discovered the so-called "hole", which is located over Antarctica.Unfortunately, the area of this hole is increasing every year, and at the moment its area exceeds the size of Antarctica itself.
destruction of the ozone layer does not pass unnoticed by the humanity, for example, in countries that are in close proximity to the mainland, an increase in diseases.Basically it is a disease associated with elevated UV background, such as cataracts, skin cancer and others.
Scientists from the northern hemisphere also observed a decrease in atmospheric ozone and report the occurrence of ozone "hole" over Svalbard.
What threatens the destruction of the ozone layer?The consequences can be the most devastating in the first place, it is reflected in the harvest, which is largely reduced.Then there are mutations of plants and animals, as well as growth disorders.Scary to think that the ozone layer may disappear altogether, because it inevitably can lead to destruction of fauna and flora.
main causes of the destruction of the ozone layer are hidden in human activities.In order to ensure your comfortable existence, a person creates and uses various industrial technologies.All kinds of aerosol sprays that contain CFCs (chlorofluoromethane) are safe for humans, but remain in the atmosphere for more than 70 years.
fact that the substance accumulates in the atmosphere, which leads to the destruction of ozone.The activities of the chemical industry contributes very hit in the air such substances.First, ozone depletion occurs under the influence of the chlorine atom 100 000 which decompose ozone molecules.
contributes to the destruction of our "shield" and military activities.Engines ballistic missiles, which are used by the military, emit the hugest amount of harmful nitrogen oxides.Each run one such rocket into space forming a huge "hole" in the ozone layer.After only a few hours, this "hole" is delayed.
Back in the 70s over the remote and uninhabited island of the US military dispersed in the stratosphere chemicals that contributed to the formation of "holes," which lasted only after several hours.Depletion of the ozone layer over the island led to the fact that much of the land inhabitants of the island was just destroyed.Animals, plants, microorganisms - all died.We could survive only a few large turtles, which survived a bone due to the thick shell.However, these turtles are blind because retina was burned by ultraviolet light.
