Every thousand cars today emits more than 3 tons of oxide vugletsyu and hundreds of other harmful substances. Therefore, one of the main tasks of scientists and engineers was the invention of "clean engine". "A fuel cell is a device that generates electricity from hydrogen, but not by combustion but by connecting it to the oxygen through controlled chemical reactions. When using pure hydrogen, unlike the hydrogen-rich fossil fuel is released only heat and water.... If you get more information, visit our site: BEST ESSAY CHEAP
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