Ammonia Infographic (IMAGE) UK Centre for Ecology & Hydrology Caption The key processes by which trees can have a beneficial effect to mitigate ammonia (NH3) air pollution Credit CEH 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.