The most important thing, in reviewing the relationship between the global environment and water resources or food production in the near future, is how the human beings and many other species with the weight of 4 billion years of evolution can attain sustainable symbioses on this Earth with limitations. Without drastic controls of materialistic greed of the human beings, this problem would not be solved - it will be difficult to establish sustainable symbioses between human beings and other lives on this planet of water - the Earth.
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