The total population of Sub-Saharan Africa is estimated to reach at least ________ by 2050
A) 1 billion
B) 950 million
C) 1.5 billion
D) 936 million
E) none of the above
Answer: C
Environmental & Atmospheric Sciences
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In the stratosphere, under natural conditions, ozone is formed and broken down by the action of
A) UVB radiation. B) free chlorine atoms. C) sulfur and carbon oxides. D) particulate matter less than 2.5 micrometers in diameter.
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During a La Niña phase, excess warm water accumulates in
A. A. B. B. C. C. D. D.
Environmental & Atmospheric Sciences
Which of the following is NOT one of the four most populous countries in the European region?
a. Germany b. Italy c. United Kingdom d. France e. Spain
Environmental & Atmospheric Sciences