Apple released its latestSupplier Responsibility Progress Reporton Friday, detailing efforts it made during 2011 to improve conditions at its supplier facilities, and to make sure its standards for labor, health and safety, and impact on the environment were being met. Here are some highlights from the report:

• In total, Apple conducted 229 audits, an improvement of 80 percent over its 2010 total. Over 100 of these audits were first-time audits.