Can a single hydropower project generate as much electricity as Britain uses?
Core argument: China's $167 billion hydropower project on the Yarlung Tsangpo has a potential capacity as high as 70 gigawatts and could generate 300 terawatt-hours a year, roughly the UK's total annual electricity use.
The Yarlung Tsangpo flows from the melting glaciers of the Tibetan Plateau, cutting a sharp U-turn around Namcha Barwa, the highest peak in Nyingchi prefecture, before plunging more than 2,000 meters (1.2 miles) over a 50-kilometer stretch — forming one of the world’s deepest canyons and an irresistible source of hydropower potential. The hydropower project, with a potential capacity as high as 70 gigawatts, could generate 300 terawatt-hours a year — roughly the UK’s total annual electricity use.

