Cover of Threats from Above Report (IMAGE) Cary Institute of Ecosystem Studies Caption Top: Coal-fired power plants are among the leading sources of airborne mercury, sulfur and nitrogen pollution. Bottom: A newly hatched common loon chick is watched by its parent as it takes its first swim. Credit Top: © Eric Middelkoop/BigStockPhoto.com Bottom: © Daniel Poleschook Jr. and Ginger Gumm Usage Restrictions May only be used to promote the Threats from Above report 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.