Consumers, not just factory workers, may be in danger from fumes from buttery flavoring in microwave popcorn, according to a warning letter to federal regulators from a doctor at a leading lung research hospital. A pulmonary specialist at Denver's National Jewish Medical and Research Center has written to federal agencies to say doctors there believe they have the first case of a consumer who developed lung disease from the fumes of microwaving popcorn several times a day for years.
http://health.yahoo.com/news/179052