Washington, D.C. - Senator James Inhofe (R-Okla.), Ranking Member of the Senate Committee on Environment and Public Works, today warned that the Obama-EPA's proposed tightening of environmental standards is the latest in a long line of EPA actions that fails to balance economic concerns with protecting health and the environment. The EPA announced a proposal today that would further tighten the Particulate Matter NAAQS standard from 15 micrograms per cubic meter of air to between 12 and 13 micrograms per cubic meter of air.