Pig farmers in Iowa are working to improve air quality while protecting soil and water resources through various technologies and practices, they said at the Iowa Pork Congress last week.

Rob Stout, a pig farmer in Washington, Iowa, is a big proponent of environmental stewardship on his farm. So much so, he was selected as the Iowa pork environmental stewardship award winner in 2017.

He raises 9,000 pigs per year in a feeder-to-finish operation.

Stout added a bioreactor to his farm in 2014. The...