Guano, the excrement of seabirds, can accumulate into phosphate-rich rocks of commercial value. This island nation had an economy entirely based on the mining of phosphate deposits.

A. Nauru
B. Bougainville
C. Pitcairn
D. Ruapehu


A. Nauru

Environmental & Atmospheric Sciences

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What are the sources of ethnic violence in Sri Lanka?

A) religious and linguistic differences B) linguistic and economic differences C) territorialism D) political and economic differences E) economic and religious differences

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Which of the following is an assumption of neoclassical economics?

A) All citizens deserve just and equal economic and sociopolitical treatment. B) Long-term effects and planning are important. C) External costs and benefits are valuable. D) Economic growth is a means toward greater human well-being. E) Resources are finite and should be conserved for the greater good of society.

Environmental & Atmospheric Sciences

The ________ earthquake was accompanied by extensive fire damage.

A) Mexico City, 1985 B) San Francisco, 1906 C) Anchorage, 1964 D) Yerevan, Armenia, 1988

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In the Af climates, ____

a. only winter months receive more than 2.4 inches of precipitation b. only summer months receive more than 2.4 inches of precipitation c. all months receive more than 2.4 inches of precipitation d. total annual rainfall must exceed 71.6 inches

Environmental & Atmospheric Sciences