Презентация по английскому языку Проблемы окружающей среды

The ozone layerWork of Nazarova Kseniya form 8 A The ozone layer – the protective sarcophagus of the EarthThe ozone layer serves as a kind of screen, which retains the rays of the Sun. As a consequence of human actions its thickness rapidly decreases, which is already a harbinger of environmental disaster, which will not keep itself waiting long. The ozone layer is destroyed as a result of emissions of CFCs. These substances are persistent gaseous structure that is not prone to any chemical reactions in the earth's surface. At room temperature they are very easy to boil, increasing its volume. Such substances are often used in the composition of the aerosol. The Destruction Of The Ozone LayerThe destruction of the ozone layer is on the brink of a natural disaster. The ozone layer is the stratosphere, which is located at 12 – 50 km above the earth's surface. In the minimum density only 0.0001% of the ozone background neutralizing all lethal ultraviolet radiation coming from the Sun. Regarding the adverse impact of solar bursts we already know, because many magnetic storms interfere with life. Ozone depletion may lead to serious and dire consequences for all life on our planet. Already marked suppression of the growth of a lot of vegetation and a massive deterioration in productivity and a dramatic drop in the mass of phytoplankton of the world ocean, and some animals begin to go blind. The ozone holeThe ozone hole – can they grow and how devastating their emergence? Ozone holes appear in the result of a sharp reduction in the thickness of the protective screen of the Earth. They can be the result of firing objects into space or the ravages of chlorine or bromine in the atmosphere. Drag these holes long, and in some cases it is not happening. During the polar nights, new ozone is not formed because of lack of ultraviolet radiation. The formation of ozone holes leads to the fact that the destructive energy of the Sun and its radiation penetrates to the earth and leads to cancer. In addition, the increased number of deaths among flora and fauna, as well as the global climate shows your changes. As a result of global warming. The consequences of the destruction of the ozone layerThe consequences of the destruction of the ozone layer to monopolistically examples. So, 1% reduction of the ozone layer causes a 4% leap in the spread of skin cancer. Causing skin cancer and the aging process, ultraviolet rays at the same time suppress the immune system, which leads to emergence, viral, parasitic and other diseases, which include measles, chickenpox, malaria, herpes, tuberculosis, leprosy etc. Tens of millions of inhabitants of the planet completely or partially lost his sight due to cataracts - a disease that occurs as a result of increased solar radiation. The growth of the damaging effects of ultraviolet radiation causes degradation of ecosystems and gene pool of flora and fauna, reduces crop yields and the productivity of the World ocean. To ultraviolet rays is very sensitive conifers and cereals, vegetables, melons, sugar cane and legumes. The experimental data indicate that the growth of some plants is constrained by existing radiation levels. Conclusion:The main objective to reduce ozone depletion in the field of transport should be a reduction or elimination of hazardous emissions or other negative impacts of the transport sector on the environment. The main goal in the field of industrial development should be to minimize the negative impact on the atmosphere through, in particular, improving efficiency in production and consumption by industry of all resources and materials. The primary goal in land management is to reduce the level of air pollution and limiting the amount of anthropogenic emissions of greenhouse gases. In the chemical industry, we have to reduce production of CFCs and HCFCs.