A study conducted by the Applied Sustainability Center of the University of Arkansas found that the carbon footprint of one gallon of milk, from farm to table, is 17.6 pounds of carbon dioxide equivalents (CO2e) per gallon of milk produced on US farms. The total fluid milk carbon footprint is approximately 35 million metric tons, which means that total US dairy greenhouse gas emissions are only about 2 percent of total US emissions, far lower than had been previously reported.