Cameron McCallie, a Duke junior, pedals a bike provided by the Fuqua School of Business and Nicholas School of the Environment Energy Club during the 2011 Earth Day Celebration on campus Thursday. The bike blends ingredients into smoothies. McCallie rode the bike for about a minute to mix up a cool drink with banana, strawberries, peaches and fruit juice. "Amazing," he said of the taste.

Students, faculty and staff groups from across campus planned 40 events between April 1 and 29 to celebrate Duke's commitment to sustainability. After kicking-off the month with a special screening of the documentary "Carbon Nation" and the start of the annual SmartCommute Challenge, other events included tours of the Sarah P. Duke Gardens and a discussion about the benefits of sustainable eating. "Attending Earth Month events at Duke are great ways to learn more about your environmental footprint," said Casey Roe, outreach coordinator for Sustainable Duke. "While they are certainly educational, the focus is also on having fun and celebrating our planet."