In the last century, humans have witnessed a dramatic increase in urbanization. A large proportion of the world population now lives in urban areas. In the United States alone, urbanized land areas have almost quadrupled from 18.6 million acres to about 74 million acres between 1954 and 1997 (USEPA, 2003). Urbanization has both direct and indirect impacts on the environment. These impacts includes but not limited to (1) habitat loss, (2) natural resource impacts (watersheds, wetlands, (3) loss of open space, (4) increase surface runoff like flooding, (5) poor water and air quality, and (6) brownfields and Environmental Justice among others.