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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

Infinitesimal radioactive isotopes can be carried along on the breeze, landing unseen on the ground, clothes and skin. These tiny products of nuclear reactions are capable of causing large-scale damage in the body if they make it inside through inhalation, ingestion or even a cut. And many fear that such isotopes spewed from the damaged Fukushima Daiichi nuclear plant are traveling inter-continentally--and in higher quantities than Japanese officials are reporting