The Baltimore Ecosystem Study (BES) is a groundbreaking urban ecology research project that launched in 1997 and, 22 years later, is still…producing novel and important research. As one of the NSF’s 28 LTER sites, the BES aims to understand the city as a living, ecological system and has brought together researchers from across the country to investigate the unique urban aspect on topics as varied as hydrology, biology, geography, environmental justice, epidemiology and environmental chemistry. Over the past two decades, this work has resulted in dozens of findings that have reshaped the way nature — and parks — are perceived in urban areas around the world. Read more at Parks & Recreation magazine.