Students track their performance using a new online, realtime energy dashboard. The 2015 CCN Challenge ran from March 26th through April 9th, with 13 of the Residence Halls competing to win. The challenge ended with the EcoRep's GreenFest celebration, and recognized Ruggles Hall residents for their 15% reduction in electricity usage, beating out Woodbridge and River, who came in 2nd and 3rd place, respectively. Collectively, the residence halls reduced energy usage by 4.7%, saving 17,156 kWh of electricity, or 11.8 Metric tons of CO2...the equivalent of the annual greenhouse gas emissions from almost 3 cars!