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And because they use the hydroelectric power, other people must use the coal power for electricity. Coal is a huge part of the grid in China.

• logicchains 6y ago
  >And because they use the hydroelectric power, other people must use the coal power for electricity Not necessarily; the excess power goes to waste after whatever batteries the grid has are filled.
  • dieortin 6y ago
    You could ramp down coal plants instead of just wasting the excess power
    • rawtxapp 6y ago
      Except you need to provision for peak demand.
      • iso1631 6y ago
        Which Hydro is brilliant at, it's literally stored energy waiting to be used by opening the gates.
  • Retric 6y ago
    Dams are effectively batteries. Total production over a month is roughly fixed, but second by second they have a lot of flexibility. Pumped hydroelectric was invented afterwards to fill the same role.