Species Threatened by Each Oil Crop (IMAGE) University of Exeter Caption Oil levels in bottles represent the number of species threatened by each oil crop per million tons of oil produced. Credit University of Exeter Usage Restrictions This image may only be used with reports of this research License Licensed 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.