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This concept can hardly be considered rather accurate. And not incidentally many authors enough differently treat a being of global studies. And the quantity of global problems varies in very wide limits: from, about, ten to forty and more. But if to mean the main problems, their no more than ten:

According to modern representations, the biosphere — is the peculiar cover of Earth containing all set of live organisms and that part of substance of the planet which is in a continuous exchange with these organisms.