McConnell Lake, Alberta (IMAGE) University of Washington Caption The signal of nitrogen from human activities has been captured in the sediments of McConnell Lake, Alberta, and other remote lakes from the US Rocky Mountains to northern Europe. Credit R. Vinebrooke Usage Restrictions Image credit required 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.