Environmental Science
The primary source of energy for the earth's atmosphere is:

The sun
Latent heat released during the formation of hurricanes
Energy from within the earth
Lightning discharges associated with thunderstorms
Erupting volcanoes

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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?

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

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