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That puts the air quality specialist and animal emissions expert in the middle of a heated dispute coming to a head Aug. 1, when the San Joaquin Valley Air Pollution Control District will announce its new emissions factor for cows the amount of VOCs, in pounds, that a cow releases each year. The number will eventually determine which dairies must apply for air quality permits and invest in mitigating air pollution equipment

http://news.yahoo.com/s/ap/wst_dairy_air