Revisions to the air quality standards for ozone and particulates, promulgated by the Environmental Protection Agency in 1997, may also command renewed attention in the 107th Congress. The standards were challenged in the courts, and implementation is currently in limbo, pending resolution of appeals to the Supreme Court. The Court heard oral arguments November 7, 2000, and a decision is expected in spring 2001. The decision is likely to stimulate congressional oversight, and perhaps legislation.