Environmental Science
Mobile combustion accounts

50-60 % of air pollution
40-50% of air pollution
10-20% of air pollution
5-10 % of air pollution

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

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

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