Alternative Energy Sources

At the beginning of the twentieth century the world has suffered from the exploitation of natural resources and air pollution and soil degradation. Oil, for example, has been a source of energy, and extracted continuously so that their wells have begun to run low, less than 100 years after the beginning of their effective use. Coal is a resource even older, is also considered esgotável. Nuclear power, just as is the warning about the danger of radioactive waste. The use of traditional

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