A review by experts at Iowa State University finds most of the studies on ways to handle the odor and emissions from animal livestock facilities in the state fail to get very far. Dan Andersen in the Department of Agricultural and Biosystems Engineering says they looked at odor control research projects in three areas.

Andersen says it is surprising given the concerns about livestock odors in Iowa that more of the lab tests haven’t advanced.

Andersen and others looked at more than 260 research papers on the effectiveness of technologies intended to control gaseous, odor and particulate emissions from livestock and poultry operations.