Why is the concept of pumping water uphill not commonly used as a source of electricity generation, similar to pumped-hydro systems?

There are about 4 places where they have large pumped hydroelectric storage in California. A couple...
There are about 4 places where they have large pumped hydroelectric storage in California. A couple...
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IT does not matter, mainly because it does not exist. My problem is that people who try to shove the...
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Did you write this for a Remedial English class? Have another look before you hand it in.
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