The process of photosynthesis uses CO2. So it stands to reason that the larger the photosynthesizer, the more CO2 it will suck up. However growth rate is also a huge factor as this uses huge amounts of energy. Mangroves, grasses, and algae blooms all use great amounts of CO2 per acre. However a single mature tree can absorb on average 48 lbs of carbon dioxide per year.
There’s a lot of controversy going on now about whether older, larger trees or young, fast growing trees sequester more carbon. According to the EPA, “Young, fast-growing trees in particular will remove more carbon dioxide from the atmosphere than they will release.” However, a University of Florida IFAS study found that larger trees that accounted for a very small percentage of urban forest sequestered more than 70% of total carbon captured. The conclusion reached by these researchers was that “the best possibility for reducing carbon emissions during the development process is conserving the larger, healthy trees that capture more carbon.”
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