Bastviken vatten (IMAGE) Linköping University Caption The contribution of northern lakes to global methane emissions is 15 per cent lower than previously estimated. Credit Monica Westman Usage Restrictions in connection with news from Linkoping university 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.