The approximate population of the Middle East/North Africa is:
A) 1 billion
B) 200,000
C) 500 million
D) 5 million
E) 325 million
Answer: C
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Using duckweed in a lagoon as low-tech sewage treatment plants is an example of
A. Tertiary sewage treatment B. Extraction techniques of remediation C. Bioremediation D. A containment method of remediation E. In vitro extraction techniques
What is meant by the mixing time of the ocean?
In 1848, San Francisco Bay looked much different than it does today. At one time, the largest part of this estuary had an area defined by approximately ________
A) 20 × 40 km B) 40 × 150 mi C) 30 × 80 km D) 40 × 50 mi E) 15 × 40 km
Subtropical waters are typically more saline than equatorial waters because of
A. high evaporation, high precipitation. B. high evaporation, low precipitation. C. low evaporation, high precipitation. D. low evaporation, low precipitation.