> I mean you have massive, massive mountains that preclude you from doing that fast or in an energy efficient way. Water goes up and takes energy. Water goes

> I mean you have massive, massive mountains that preclude you from doing that fast or in an energy efficient way. Water goes up and takes energy. Water goes down and releases energy. Sure, there's loss to inefficiencies, but it's not like the energy used to pump the water uphill is completely lost. You can also pump it uphill when you have excess renewable energy and reclaim most of that energy when you do not. > Its far, far simpler and cheaper and effective to increase dwell time of rain water. Sure, but focusing on any single solution, including a national water grid, isn't going to solve the problem.