When Hamilton College started measuring its CO2 emissions in 2007, carbon equivalents measured 22,540 metric tons. By 2011, the College had reduced emissions to a total of 17,817 metric tons, surpassing its 2015 Climate Action Plan goal of 18,032 and achieving a 20 percent reduction four years ahead of schedule. In the past year, solid waste was also reduced on campus by 25 percent from 916 to 675 metric tons.