[Role of biodiversity in maintaining Earth;s climate and and human civilization. Problems of geobiophysics].

Factors affecting the concentration of CO2 in atmosphere were analyzed, and the conditions providing the Earth termal balance stability were considered. It was shown that the antropogenic decrease of biodiversity in climate-forming biosystems, such as swamps and tropical seas, may lead to the greenhouse disaster, resulting in the raise of the temperature on the Earth's surface up to 300 degrees C and elimination of Life on Earth. By the example of the ecological disaster caused by the introduction of the European mollusc Dreissena into fresh waters of the North America, which was predicted by us, it was shown that the main reason for the decrease in biodiversity, which can accelerate the greenhouse disaster, is the violation of one of the Darvin principles of species formation, the principle of geographical isolation of species. It is shown in terms of a new model of periodical glaciation of the Northern Hemisphere that the elevation of Earth surface temperature caused by an increase in CO2 concentration in the atmosphere can substantially accelerate the onset of a new glaciation period in the Northern Hemisphere, which may decrease the greenhouse disaster rate. The necessity of the formation of a new interdisciplinar scientific branch, geobiophysics, is considered.