Trees absorb carbon dioxide and release oxygen. We need to plant more trees to improve our air quality. It will take a tremendous effort to reverse deforestation.

One large tree can supply a day's supply of oxygen for four people.
A healthy tree can store 13 pounds of carbon each year, for an acre of trees that equals to 2.6 tons of carbon dioxide.
Each gallon of gasoline burned produces almost 20 pounds of carbon dioxide.
For every 10,000 miles you drive, it takes 7 trees to remove the amount of carbon dioxide produced if your car gets 40 miles per gallon (mpg); it will take 10 trees at 30 mpg; 15 trees at 20 mpg; 20 trees at 15 mpg; and 25 trees at 12 mpg)

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