The U.S. House of Representatives took the first steps toward approving an ambitious and wide-ranging global-warming bill on May 21. The Energy and Commerce Committee approved a bill that industry sources are calling historic by a 33-25 vote, largely along party lines. Photo: AP/WideWorld Bill sponsor Waxman (center) and GOP’s Barton oversaw a week of markups. Photo: AEP Bill sets 83% target reduction by 2050. The massive bill—more than 930 pages—is the result of weeks of hearings and negotiations in the House, and it is supported by a wide range of environmental groups, corporations, electric utilities and energy companies. But
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.