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Biology 8 Online
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?

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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