Hermann Scheer, a member of the German parliament and an internationally known renewable energy expert, will speak at the University of Colorado at Boulder on Tuesday, Feb. 20. Scheer will talk about his new book, "Energy Autonomy -- the Economic, Social and Technological Case for Renewable Energy," at 1:30 p.m. in Old Main Chapel. The free, public event is sponsored by the Colorado Renewable Energy Collaboratory and CU-Boulder's Energy Initiative.