After 10 years of construction the Chinese authorities are closing the sluice gates on the massive Three Gorges dam to allow its reservoir to start filling up.

The $25bn project is the largest hydro-electric power project in the world, but years of controversy have surrounded its building.

The Three Gorges dam looms 300 metres above the Yangtze River in central China.

Its construction won’t be completed until the end of the decade, but on Sunday the water level in its reservoir will be allowed to start rising and in the coming years the dam will create a lake 600 kilometres long.

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