Study: U.S. Methane Emissions Higher Than Estimated

(Washington, DC) -- Results from a new study show that the U.S. emissions of methane are much higher than current estimates. The findings published in the "Proceedings of the National Academy of Science" show that greenhouse gas emissions from livestock and the extraction of oil and natural gas are likely 50 percent higher than previously thought. The discrepancy could be in the testing methods. The latest data was taken from the tops of telecommunication towers and calculated what is actually present in the atmosphere. Previous studies used a "bottom-up" approach, calculating emission based the amount of methane typically released per cow or per unit of coal or natural gas sold.