Environmental Science
Typically, water vapour occupies about what percentage of the air's volume near the earth's surface?

Less than 4 percent
None of these
Close to 10 percent
About 78 percent
About 21 percent

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Environmental Science
If a glass of water were surrounded by saturated air:

The water's temperature would slowly decrease
The level of the water in the glass would slowly decrease
The level of the water in the glass would not change
The water's temperature would slowly increase

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