Iowa State University (ISU) is measuring air emissions from two Tyson broiler chicken houses in western Kentucky as part of a new air compliance agreement between the Environmental Protection Agency (EPA) and industry groups. The $1 million project in Kentucky, funded by Tyson Foods, was originally designed to monitor just ammonia. But the EPA agreed Iowa State could expand the project to include other items of interest - carbon dioxide, three types of particulate matter, hydrogen sulfide and nonmethane hydrocarbons.