The U.S. is gaining ground in its push to prompt China to end subsidies to its domestic wind-energy companies and give U.S. firms greater access to the booming Chinese wind market. APWideworld Workers install wind turbine at wind farm in east China's Anhul province. As China's wind power market expands, the U.S. has challenged China's subsidies to its equipment manufacturers, saying they violate World Trade Organization rules. Related Links: USTR's Release In the latest development in an eight-month trade dispute, U.S. Trade Representative (USTR) Ron Kirk says China has closed down a wind-energy fund that the U.S. contends violated World
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.