Three Gorges Dam, which will cost £14.7bn, has been condemned by environmentalists. However, the dam's promoters point to the country's undeniable energy needs. With an economy growing faster than 7% a year, power shortages are common. Analysts say the country faces a power shortfall in the next three years despite increased capacity from Three Gorges Dam. In an effort to solve the problem, China has set up the world's largest electricity grid to improve efficiency. The government plans to extend it into a national power grid by 2010, with the Three Gorges Dam as its centrepiece.