Technology for the Reduction of Particulate Matter Emissions for Residential Propane BBQs
http://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstractDetail/abstract/10266/report/0
From the EPA Doc
“We expect to limit the overall air pollution PM emissions from barbecuing and to alleviate some of the acute health hazards that a barbecue pit master can experience from inhalation”
If the Pit master wants to max out his weber,smoke a Kool drink a beer and fart all at the same time what business is it of the US Government.