Hundreds of lakes and miles of rivers and streams surround the Detroit region. The point of great concern for the Motor City is air pollution. Many organizations are now working with the goal of improving the quality of life by initiating conservations between residents and businesses.Being one of 13 American metropolitan areas that are home to professional teams representing the four major sports in North America, Detroit have three active major sports venues within the city. They are, Comerica Park, Ford Field and Joe Louis Arena. Sailboat racing is a major sport in the Detroit area.