Environmental Science
If you want to keep an object cool while exposed to direct sunlight,

Wrap it in black paper
Wrap it in aluminum foil with the shiny side facing inward
Wrap it in aluminum foil with the shiny side facing outward
Put it inside a brown paper bag

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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?

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

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