China’s colossal 22.5 GW Three Gorges Dam is now working at full capacity after the last of its 32 generators went into operation, said state news agency Xinhua.

“The full operation of the generators makes the Three Gorges Dam the world’s largest hydropower project and largest base of clean energy,” said Zhang Cheng, general manager of China Yangtze Power (SSE: 600900).

The dam on the Yangtze River entered operation in 2003 at a cost of $22.5bn but has proved controversial.

Its construction involved relocating 1.4 million people and raised fears over pollution and earthquakes. The dam’s reservoir stretches 600 km through an area riddled with geological fautlines.

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