This story was originally published by The New Lede. Roughly a quarter of the nation’s large cattle, dairy and hog farms are located in just 30 U.S. counties, a new satellite-mapping study has found. The research also links large farms — whether in these dense hotspots or scattered elsewhere — to elevated air pollution. The study supports […] The post Study maps factory farm hotspots as federal court tosses emissions lawsuit appeared first on Investigate Midwest.