By SARA GIBONEY UNK Communications KEARNEY – Chad Pregracke has made removing debris from the Mississippi River and other waterways his life’s work. He and his crew of over 60,000 volunteers have collected over 6 million pounds of garbage. The CNN Hero of the Year will share his story Thursday at the University of Nebraska at Kearney as part of Earth Week events. Earth Week aims to educate the community about the importance of reducing the ecological footprint on … [Read more...] about CNN Hero of the Year to speak during UNK Earth Week