Leaves and Oxygen Comparison
Pound for pound, do pine needles vs. other kinds of
leaves put out the same amount of oxygen? Deciduous vs. evergreen?
Generally in temperate forests, deciduous trees might be expected to have
higher rates of photosynthesis than needle-bearing evergreen
trees. However, the situation might be expected to be the reverse in
tropical forests where the evergreens are often broad-leaved.
Anthony Brach Ph.D.
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Update: June 2012