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We here in the "Land of the (eroding) Free" have been under notice (2015) that the benevolent EPA is striving to help us reduce the pollution effect of our outdoor grills. While the following specifies pollution from dripping grease, I'm sure that they will be happy to add wood-burning pollution to this study. Just envision a honking big catalytic converter rising from your Weber Kettle! Tailgating will never be the same!

Get ready to slap some catalytic converters on BBQs
"The Environmental Protection Agency has its eyes on pollution from backyard barbecues. The agency announced that it is funding a University of California project to limit emissions resulting in grease drippings with a special tray to catch them and a "catalytic" filtration system. The $15,000 project has the "potential for global application," said the school."

....a filter and fan are proposed for installation. "The secondary air filtration system is composed of a single pipe duct system which contains a specialized metal filter, a metal fan blade, a drive shaft, and an accompanying power system with either a motorized or manual method. This system can be powered by either an exterior electric motor with a chain-driven drive shaft, directly spinning the fan blade, or a hand-powered crank," said the project write-up.