Earthwatch Institute invites you to join them for Exploring Cambridge’s Urban Forest on Saturday, June 7, July 19, August 2, September 6, or October 11.  You can be a citizen scientist by identifying and measuring Cambridge trees, and by recording tree health and locations.  Trees filter pollutants, mitigate climate change, improve human health, and more.  Together your research results will help shape policies to improve urban forests.  Go to www.earthwatch.org/expeditions/exploring-bostons-urban-forest or call 1-800-776-0188 for more information. You’ll note the website refers to Boston but the press release refers to Cambridge – let’s just call this the Metro Area.