The College’s Committee on Sustainability and Facilities Management have identified potential energy efficiency improvements around campus. Using information about the cost of project implementation and the project’s lifetime energy savings, we have calculated the CO2 equivalent reductions per dollar per year for relevant energy projects.

**Ground Transportation:**

**Bus** = 0.300kg CO_{2}/mile x $0.058 = $0.018/mile

**Amtrak** = 0.191 kg CO_{2}/mile x $0.058 = $0.012/mile

**Car** = 0.444 kg CO_{2}/mile x $0.058 = $0.027/mile

**Air Transportation:**

**Short** (<1000 miles) = 0.25 kg CO_{2}/mile x $0.058/kg CO2 = $0.015/mile

**Typical** (1000-3000 miles) = 0.2 kg CO_{2}/mile x $0.058/kg CO2 = $0.012/mile

**Long** (>3000 miles) = 0.175 kg CO_{2}/mile x $0.058/kg CO2 = $0.011/mile

**Project Calculations:**

**Total cost** = $22,144

**Annual energy use reduction** = 67,510 kWh/year

**Lifespan** = 10 years

**Total energy use reduction** = 675,100 kWh

**CO _{2} emissions per kWh** = 0.57 kg CO

_{2}/kWh

**Total emissions reduction**= 675,100 kWh x 0.57 kg CO

_{2}/kWh = 384,807 kg CO

_{2}

**Cost per unit CO**= $22,144/384,807 kg CO

_{2}reduction_{2}= $0.058/kg CO

_{2}

**Activity calculations adapted from:**

Christopher M. Jones and Daniel M. Kammen, Quantifying Carbon Footprint Reduction Opportunities for U.S. and Communities. Supporting Materials. Environ. Sci. Technol., 2011, 45 (9), pp 4088–4095.