IMG 8044 Natural Spring Sampling (image) University of California - Davis Share Print E-Mail Caption Jasmine Saban, a doctoral student at the University of Southampton, examines plants at a spring in Italy with naturally occurring high levels of carbon dioxide. Credit Gail Taylor/UC Davis Usage Restrictions Provide credit. Share Print E-Mail 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.