From ancient times people use various energy sources. Geothermal energy were used for springs and heating, hydro and wind energy were used for mills, sailing, water pumps and other mechanical devices, solar energy was used for heating, biomass and coal were used for heating, illumination, cooking, and so on. For example, nearly 2000 years ago the Greeks used water wheels to grind wheat into
Sunday, December 16, 2012
Energy history facts
1:41 PM
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