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Home Q & A Board Science-Related Homework Help Geography and Earth Sciences
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masterson masterson
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7 years ago
The most important source of the free oxygen in our atmosphere is:
A) green plants that carry on photosynthesis.
B) deforestation.
C) volcanic degassing.
D) the dissociation of water vapor in the upper atmosphere.
Textbook 
Atmosphere: An Introduction to Meteorology

Atmosphere: An Introduction to Meteorology


Edition: 12th
Authors:
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goIrishgoIrish
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7 years ago
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7 years ago
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