Animal feed, not automobiles, makes the San Joaquin Valley a smog hotspot
Wednesday, April 21, 2010 - 12:30
in Earth & Climate
A new study identifies cattle feed as a possible culprit in the long-standing mystery of why California's San Joaquin Valley -- a moderately-populated agricultural region -- has higher levels of ozone (one of the main ingredients in smog) than many densely-populated cities. The report, which explains how fermented cattle feed works with automotive exhausts in forming ozone, is in ACS' Environmental Science & Technology, a semi-monthly journal.