http://consumerist.com/2007/09/26/the-house-of-representatives/

The House of Representatives passed a bill today that would require OSHA to limit workers’ exposure to diacetyl, the recently popularized butter-flavored chemical used in microwave popcorn and the suspected source of dreaded “popcorn lung.” The White House has threatened to veto any regulation sent its way, and some House Republicans agree. Said Representative Joe Wilson of South Carolina, “Fundamentally, the science does not exist to state the link between diacetyl and impaired lung function.” [Reuters]