oppose tougher standards. <a href="http://www.whitehouse.gov/omb/oira/2000/meetings/692.htmlPrepare">http://www.whitehouse.gov/omb/oira/2000/meetings/692.htmlPrepare</a> for more visitations from other groups linked to ExxonMobil, the National Association of Manufacturers, and other industry groups opposed to cleaner air.