A public service bench ad stands in front of a newly opened Walmart store in the Altadena neighborhood of Los Angeles Tuesday, May 28, 2013. Wal-Mart Stores Inc. pleaded guilty on Tuesd

 

              A public service bench ad stands in front of a newly opened Walmart store in the Altadena neighborhood of Los Angeles Tuesday, May 28, 2013. Wal-Mart Stores Inc. pleaded guilty on Tuesd
A public service bench ad stands in front of a newly opened Walmart store in the Altadena neighborhood of Los Angeles Tuesday, May 28, 2013. Wal-Mart Stores Inc. pleaded guilty on Tuesday to charges the company dumped hazardous waste in Calif. Wal-Mart entered the plea in federal court in San Francisco to misdemeanor counts of negligently dumping pollutants from Walmart stores into sanitation drains across California, a company spokeswoman said. (AP Photo/Damian Dovarganes)