FILE - This Dec. 8, 2009 file photo shows California Highway 41, the main street of Kettleman City, Calif. The tiny farm town is home to the largest toxic waste dump in the West. On Monday, Nov. 22, ... more 
FILE - This Dec. 8, 2009 file photo shows California Highway 41, the main street of Kettleman City, Calif. The tiny farm town is home to the largest toxic waste dump in the West. On Monday, Nov. 22, 2010, California health officials said they found no common cause for birth defects plaguing infants in an impoverished San Joaquin Valley farm town where residents are battling plans to expand the state's largest hazardous-waste landfill. less 
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Associated Press | Photo By Reed Saxon, File
Mon, Nov 22, 2010 4:41 PM EST