Related Links: Link to U.S. Court of Appeals for the D.C. Circuit opinion EPA page on Mercury and Air Toxics Standards In a blow to industry, a three-judge panel from a federal appeals court has upheld an Environmental Protection Agency’s rule governing air emissions of mercury and other hazardous pollutants.The next step in the case for the energy companies, states and industry groups that challenged the EPA rule could be an appeal for a re-hearing by the full court. According to at least one of the parties in the case, a decision has not yet been made on an appeal.The
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.