GHG emissions from international aviation

The United States of America is the top country by GHG emissions from international aviation in the world. As of 2008, GHG emissions from international aviation in the United States of America was 77.9 metric tons that accounts for 28.86% of the world's GHG emissions from international aviation. The top 5 countries (others are the United Kingdom, Germany, France, and Japan) account for 64.32% of it. The world's total GHG emissions from international aviation was estimated at 269.8 metric tons in 2008.