Результаты (
английский) 3:
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living organisms living on earth, brought the huge variety. this diversity evolved over a long period of evolution, has for more than 4 billion. years. now it is declining rapidly. the impact of human society on the biosphere is steadily increasing. the existence of human beings on the planet is directly dependent on the availability of different food resources, which in turn is linked to the species diversity in the biosphere.the main causes of biodiversity loss are:the destruction of natural ecosystems as a result of deforestation, expansion of arable and grazing land, the construction of cities, roads, canals, and other communications;growth of population and the development of its economic activities; the pollution of atmosphere in the production of emissions;application of pesticides in agriculture, causing the death of insects, birds, fish, and some species of animals.now the rate of extinction of species is 50 to 100 times the natural rate. approximately a quarter of all species of animals and plants in the world in the next 20 to 30 years. in the catalogues made $14 million. animal and plant species disappeared at this time.
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