11.Rainfall retention. A healthy, sodded lawn absorbs rainfall 6 times more effectively than a wheat field and 4 times better than a hay field.13
**Natural storm water management. **A big tree removes 60 to 70 times the pollution than a small tree.14
12.Reduced temperatures. In Atlanta, temperatures have climbed 5 to 8 degrees higher than surrounding countryside where developers bulldozed 380,000 acres between 1973 and 1999, according to NASA. Scientists fear the heavily developed corridor between Boston and Washington could be the next big hot zone.15