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Chemistry
Chemistry
Problem
Planting more and more trees helps to: a. reduce
CO
2
\text{CO}_2
CO
2
in the air b. increase
CO
2
\text{CO}_2
CO
2
in the air c. reduce
O
2
\text{O}_2
O
2
in the air d. reduce
CO
2
\text{CO}_2
CO
2
and increase
O
2
\text{O}_2
O
2
in the air
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