Associated Press: Air officials for years have blamed dairy cow emissions for the unusually high ozone levels in California’s San Joaquin Valley, but a new study points more to what goes into the animals than what comes out. The study — funded by the U.S. Department of Agriculture, California Air Resources Board and the San Joaquin Valley Air Pollution Control District — initially was intended to measure the impact of animal manure, urine and flatulence on ozone levels. University of …