Environmental Science
Condensation nuclei may be:

Smoke from forest fires
Particles of dust
All of these
Nitric acid particles
Salt from the ocean

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Environmental Science
What is the cause of the Exxon Valdez?

a plane which crashed and caused death of human life
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

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