Результаты (
английский) 1:
[копия]Скопировано!
Organisms living on Earth, presents a huge variety. This diversity evolved over a long period of evolution, formed for more than 4 billion. years. Now it is declining at an accelerated pace. The impact of human society on the biosphere is constantly growing. The existence of people on the planet depends on the availability of their different food resources, which in turn is associated with species diversity in the biosphere. The main causes of loss of biological diversity are: -destruction of natural ecosystems as a result of deforestation, the expansion of arable and grazing areas, construction of cities, roads, canals, and other communications; -world population growth and the development of its business activities; industrial pollution emissions; -the use of pesticides in agriculture, causing the deaths of insects, birds, fish, some species of animals. Now the pace of species extinction in 50-100 times the natural rate. About a quarter of all animal and plant species on the planet is threatened by extinction in the next 20-30 years. In the catalogues made 14 million. species of animals and plants extinct by now.
переводится, пожалуйста, подождите..
