In its latest two-step, the EPA once again is deliberately narrowing the frame through which it obtains scientific analysis of the link between air pollution and public health. First, the agency is excluding qualified scientists from the Clean Air Science Advisory Committee (CASAC), the independent group charged by the Clean Air Act with providing the EPA with scientific advice on air quality standards. Second, the EPA disbanded the additional panel of experts it had formed to review the National Ambient Air Quality Standards (NAAQS) for Particulate Matter, leaving just the now re-constituted seven-member main CASAC to cover a Herculean scientific task.