A movement is underway to plant 7.8 billion trees by 2020, the 50th anniversary of the first Earth Day in 1970. People can plan their own events or donate to help others plant trees. For more information about Let's Get Planting, go to earthday.org. Why more trees? • Trees absorb excess carbon dioxide from the air. A single acre of mature trees can absorb the same amount of carbon dioxide produced by driving a ... Source
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