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Which trees put the most oxygen into the air and so would be best to plant to help our environment?


I guess they'd have to be evergreens, as deciduous trees wouldn't do much in the winter, but would they be something like a cypress or fir that has lots of needle-like leaves, or something quite different?

 

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Denise Handlon says

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5 years ago
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Bronwen Scott-Branagan (BlossomSB) says

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