Yes. Plants can use any CO2 that
is in the air, whether it comes from a
volcano, burning plant matter, an animal
respiring, another plant respiring, or even its
own respired waste.
Yes - that's where the plants get the
CO2 they need. They can use whatever
CO2 gas they find in the atmosphere -
There are both natural and human sources of
carbon dioxide emissions. Natural sources
include decomposition, ocean release and
respiration. Human sources come from
activities like cement production,
deforestation as well as the burning of fossil
fuels like coal, oil and natural gas.
carbon dioxide emissions
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