Cover of The North American Mosaic (IMAGE) Commission for Environmental Cooperation Caption The North American Mosaic: An Overview of Key Environmental Issues addresses environmental issues related to air and water, biodiversity and ecosystems, and pollution. Credit CEC 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.