Calculator provided by Deposit Now. 1 Based on the Energy Information Administration's published estimate of 19.6 gallons of finished gasoline, plus by products, per barrel of oil refined. 2 Based on U.S. Environmental Protection Agency's published figure of 8.8kg carbon dioxide produced per gallon of gasoline. 3 Based on estimated 330 pounds of carbon dioxide consumed per tree annually by the USDA Forest Service Center for Urban Forest Research.