Answered by Jerry | Oct. 12, 2012 22:41
It is the world's largest hydroelectric dam, spanning the Yangtze River in Hubei province, China. It is 7,661 feet (2,335 m) long at the top, with a reservoir of about 410 miles (660 km) long and 3,7000 ft (1.12 km) wide. When working at full capacity, it can reduce coal consumption by 31 million tons per year, significantly reducing China's carbon emissions and saving hundreds of thousands of lives affected by disease caused by smoke from coal plants. It also serves an important function for flood control.