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Chemistry 17 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 (damonte212):

Atmospheric pressure (which is measured with a barometer and is also known as barometric ... The percentage of oxygen in the air at sea level is the same at high altitudes -- roughly 21 percent. ... There's no clear reason why, but researchers suspect it has something to do with their ... 10 Essentials to Bring on a Road Trip.

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