Fossile fuels like coal and mineral oil are the resource to produce energy for several centuries. With the steady growing demand for energy, the world's population is about to have won all coal and used a large part of the world's deposit of oil. Fossile fuels are produced in thousands of years during a geological and biological process and cannot be reproduced once they have been used. That is the reason why many nations try to find alternative renewable energy sources that we need to maintain our living standards and to protect our endangered climate.
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