According to Cornell University, the dairy community has already reduced its carbon footprint by more than 63 percent between 1944 and 2007, due to improved cow nutrition, cow comfort, quality of the animals, and other improvements. Compared to farms in 1960, USDA statistics show that US dairy farms today are producing almost three times more milk with about half the number of cows. In addition, milk performed better than other beverages in the 2010 Nutrient Density to Climate Impact (NDCI) Index, which compared nutrient density to climate impact.