Environmental Science
The albedo of the earth's surface is only about 4%, yet the combined albedo of the earth and the atmosphere is about 30%. Which set of conditions below best explains why this is so?

High albedo of clouds, high albedo of water
Low albedo of clouds, low albedo of water
High albedo of clouds, low albedo of water
Low albedo of clouds, high albedo of water

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Environmental Science
Which statement(s) below is/are correct?

Fog can be composed of ice crystals
All of these
Without the summer fog along the coast of California, redwoods would not grow well there
Valleys are more susceptible to radiation fog than hill tops

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