From Arbor Day Site ( :


Trees help reduce the effects of climate change.

Trees absorb carbon dioxide (CO2), removing and storing the carbon while releasing the oxygen back into the air.

In one year, an acre of mature trees absorbs the amount of CO2 produced by a car driven 26,000 miles.

During one year, a mature tree will absorb more than 48 pounds of carbon dioxide from the atmosphere and release oxygen in exchange. 
share  European Environment Agency

Nearly 20 pounds of carbon dioxide are produced from burning one gallon of non-ethanol gasoline. 
share  U.S. Energy Information Administration

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