WHAT:  Don’t miss Clean Sweep, the 27th annual city-wide cleanup event organized by Keep Austin Beautiful (KAB). In 2011, over five thousand volunteers from Tarrytown to Senna Hills picked up over twenty-five tons of trash from public spaces at 136 cleanup locations around Austin! WHY:  “Clean Sweep brings Austinites of all ages together in a day of service to care for our precious parks, waterways, neighborhoods, and schools,” explains Community …