Two compromise Senate climate-change proposals have been floated in hopes of finding enough support to win a floor vote. In November, the Environment and Public Works (EPW) Committee cleared a climate bill but got no GOP votes. Trying a new approach, John Kerry (D-Mass.), Joseph Lieberman (I-Conn.) and Lindsey Graham (R-S.C.) on Dec. 10 released a “basic framework for climate action” that said an emissions cap of about 17% less than 2005 levels “is achievable and reasonable.” EPW’s bill has a 20% cut. The Senate trio also want to encourage nuclear powerplant construction and boost U.S. oil and gas production.
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.