Levin, Myron/"INNOVATE: CLEAN POWER THAT'S EASY ON THE ENVIRONMENT"Sierra; Jan/Feb2010, Vol. 95 Issue 1, p14-14, 1p
The article examines the efficiency and environmental impact of dams in the U.S.It tells us how water dam can create energy. According to the author, dam construction is no longer a viable means to supply energy and the environmental damage they cause, such as the destruction of free-flowing streams, is well documented. It is more safety way to use energy then others and of course it is very pleasant for environment.
I know that in ancient times people always take energy from water power.For example water wheel,people use it to grind flour and they were happy,because bread is the most important dish till nowadays.
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