Tree Type and Oxygen
In regards to evergreens and deciduous trees, which would
put out more oxygen? It seems to me that the evergreens would due to the
fact that they remain green year round and the ratio of needles to leaves
is much greater.
On the other hand, remember rates of photosynthesis, and relative growth
rates. Perhaps tropical and subtropical evergreen trees in first place,
then maybe fast-growing temperate deciduous trees such as poplars, and then
fast-growing southeastern conifers/pines.
Anthony Brach, Ph.D
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Update: June 2012