Trees absorb carbon dioxide and emit oxygen, as everyone knows but did you know that trees capture pollutants on their leaves and that their presence on city streets mitigates rainwater and helps prevent flooding and erosion? Addtionally their canopies shade pavement thereby extending the life of the pavement. If placed in parking lots trees capture the carbon right from the cars' exhaust. On the other hand it takes 240 trees to absorb the carbon emitted by one car annually. One gallon of gasoline spews 25 pounds of pollution into the air. "The percentage of the earth's land surface covered by Read This Post »