A presidentially appointed multi-agency panel has sent a strong signal that clean coal, which is achieved through carbon capture and sequestration, should be a significant part of the nation’s future energy mix. The Interagency Task Force on Carbon Capture and Storage, led by the Environmental Protection Agency and the Dept. of Energy, sent a report to President Obama on Aug. 12 outlining steps that should be taken to overcome barriers to widespread commercial deployment of carbon capture and sequestration (CCS) technology. Industry officials say the report is a step in the right direction, but many say commercial deployment of CCS
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.