The Boston Indicators Project uses urban tree canopy initiaitve as one element of urban improvement strategy; Boston, MA

The Boston Indicators Project - Environment Innovations:
In an attempt to use nature to improve the quality of life in Boston, Boston's Urban Tree Canopy Initiative is dedicated to increasing its tree cover 20% by the year 2020. By planting approximately 100,000 trees, Mayor Thomas Menino and the Boston Urban Forest Coalition hope to improve the health and well being of Boston's residents and visitors and reduce Boston's contribution to global warming. Recent studies demonstrate that urban forests can help cities meet important environmental and public health challenges, including improving air quality, maximizing energy-efficiency, and calming crime spots.