A vicious cycle (IMAGE) Washington University in St. Louis Caption Researchers identified a potential feedback loop arising from interactions among climate, infectious diseases and methane emissions. (Image courtesy of Trends in Ecology & Evolution) Credit Image courtesy of Trends in Ecology & Evolution Usage Restrictions For editorial purposes 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.