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OpenStudy (anonymous):
The level of oxygen in the air is measured in a garden and on a city road. Which location has a higher level of oxygen and why?
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OpenStudy (sleepyjess):
Think about it, plants produce oxygen. City roads are polluted by gasoline, fumes, oil, etc... Which one do you think?
OpenStudy (anonymous):
Garden because of the pollution from the cars and factories. Cars let off carbon dioxide.
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