Hydropower is the energy source from water that is used in electricity.
There are Hydroelectric dams that produce significant amounts of carbon dioxide and methane, and in some cases produce more of these greenhouse gases than power plants running on fossil fuels according to
http://www.newscientist.com/article/dn7046-hydroelectric-powers-dirty-secret-revealed.html.
We have to stop using too much energy because this will harm our environment and climate change. We shall use solar power that come from the sun and reduce the level of the energy uses from other sources. I think they shall reduce amounts of carbon dioxide,methane , fossil fuels we can have a little carbon dioxide but not soo much that it is harming our environment. If people overused electricity, then the fishes will die of fossil fuels and no fresh water to plant trees , fruits etc so thats why we need to reduce electricity....
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