The Senate has confirmed President Barack Obama’s pick to head up the Environmental Protection Agency’s Office of Air and Radiation. The Senate approved Regina McCarthy for the post on June 2 by a voice vote. The former Connecticut Dept. of Environmental Protection chief will be responsible for overseeing the development of regulations for powerplant emissions of sulfur, mercury and nitrogen oxide. McCarthy’s nomination was held up for weeks by Sen. John Barrasso (R-Wyo.), who placed a procedural “hold” on her nomination because of her support for the EPA’s recent finding that greenhouse gases could pose a threat to public health
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.