Environmental Science
Pollutants that are introduced into the environment by human activity are called as

all of these
qualitative pollutants
anthropogenic pollutants
quantitative pollutants

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Environmental Science
The main reason why vegetables take longer to cook in boiling water at high altitudes is because:

Water boils at a higher temperature with higher altitude
The temperature of the boiling water decreases with increasing altitude
There is less oxygen in the air at high altitude
Saturation vapor pressure decreases with increasing altitude

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Environmental Science
When clouds are viewed near the horizon, the individual cloud elements usually:

Appear farther apart than is actually the case
Appear lighter in color than is actually the case
Appear to have more vertical development than is actually the case
Appear closer together than is actually the case

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