How Much of the Earth's Land Surface Is Covered by Deserts

question 89

Multiple Choice

How much of the Earth's land surface is covered by deserts? 

• A) about 10% 
• B) about 20% 
• C) about 30% 
• D) about 50%

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Definitions:

Efficient

The characteristic of a resource allocation that maximizes the total surplus received by all members of society.

Production Possibilities Frontier

A curve depicting all maximum output possibilities for two or more goods given a set of inputs (resources, technology, etc.), assuming efficient use of resources.

Technological Advance

The introduction and application of new technologies and methods that improve productivity and efficiency.

Unemployment

A situation where individuals who are able and willing to work are unable to find jobs.