An aircraft approaching a runway. (IMAGE) Heriot-Watt University Caption An aircraft approaching a runway. Turning busy long haul air routes into ‘green flight paths’ could get aviation to net zero faster, researchers say. Credit Photo by Ben Glasgow for Heriot-Watt University. Usage Restrictions No restrictions. License Public Domain 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.