BBC Wildlife Magazine

MARK CARWARDINE

Surely, hydropower has had its day? I’ve never understood why it’s always touted as an environmentally friendly source of renewable energy, when it is anything but green.

It comes from dams built in large rivers. They block the flow and store vast quantities of water behind them, in reservoirs. When the water is released, it spins turbines, which, in turn, activate generators to create

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