Environmental Science
Which of the following groups is absolutely essential functional component of the ecosystem?

Producers and herbivores
Producers and detritivores
Producers
Detritivores

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

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