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

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

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Environmental Science
What is the cause of the Exxon Valdez?

none of these.
Oil Tanker which sank in 1989 along the coast of Alaska and marine life seriously affected.
a ship which wrecked on the coast of India
a plane which crashed and caused death of human life

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