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By Valerie Volcovici Washington - The Environmental Protection Agency overstepped its authority by moving to regulate greenhouse gas emissions from power plants and industrial facilities, industry groups and representatives argued in federal court on Wednesday. In the second day of two-day arguments on a case seeking to overturn the agency's proposed greenhouse gas regulations, challengers took on two of the EPA's proposed rules to regulate stationary sources under the Clean Air Act. Wednesday's oral arguments centered on the so-called "tailoring rule," which the EPA issued in 2009 to shield small stationary polluters, such as schools, from having to obtain permits for greenhouse gas emissions

UNITED NATIONS -- They are the carbon offsetting projects most hated by environmentalists, but there may now be an opportunity to put an end to them. Currently, there are five coal-fired power plants registered as emission reduction projects under the Clean Development Mechanism (CDM), an international offsetting program run by an arm of the United Nations. Pressure from developing nation governments led to their inclusion in the program, as supporters claim the newer supercritical coal plants avoid carbon dioxide emissions by preventing dirtier plants from being built instead.