Air and water pollution from large, corporate-owned hog farms have prompted a new wave of regulation in some states. But, not in Colorado. Colorado's hog industry has been growing fast ever since corporate hog farmers found out that it has some of the most lenient hog farming rules in the country. But that may soon change. State lawmakers and federal regulators are vowing to clean up the industry. From Colorado Public Radio, Thomas Lalley visits one county where pigs may soon outnumber people, twelve to one.