The White House has launched a package of proposals--including a new tax credit and grant competition among states and cities--that aim to make commercial buildings 20% more energy efficient over 10 years. Related Links: Summary of the White House Plan The "Better Buildings Initiative," which President Obama announced on Feb. 3 during an appearance at Penn State University, is targeting commercial buildings, which the White House says account for about 20% of total U.S.energy consumption. Obama said the plan could save businesses nearly $40 billion over the next decade in lower energy costs. The plan has several components, some of
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.