Donut chart astronomy emissions (IMAGE) PNAS Nexus Caption Nested donut charts displaying the number of conference trips taken and divided by classification (short-, medium-, and long-haul) in the inner ring, versus the total emissions produced for each category in the outer ring. The ’long-haul’ classification includes trips with ultra-long distances, which make up 0.2% of all trips and 1.3% of all emissions. Credit Gokus et al Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.