Heavily Drained Bog (IMAGE) McMaster University Caption This heavily drained section of bog outside Fort McMurray, Alta., populated by larger black spruce trees, burned more severely than moderately drained and undrained sections. Credit Sophie Wilkinson, McMaster University Usage Restrictions None 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.