From the report:
Our audits have always checked for compliance with environmental standards. In 2011, in addition to our standard audits, we launched a specialized auditing program to address environmental concerns about certain suppliers in China. Third-party environmental engineering experts worked with our team to conduct detailed audits at 14 facilities. We uncovered some violations and worked with our suppliers to correct the issues. We will expand our environmental auditing program in the coming year.
You can view the report as a PDF here.