Global warming
A) replaced the ozone layer as the most pressing environmental issue by 2007.
B) has not been proven to be caused by human activity.
C) replaced the 1970s environmental issue of a returning ice age.
D) all of the above.
E) none of the above.
D
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Probably the highest-priority long-term social problem in Latin America is controlling ____________________
Fill in the blank(s) with correct word
In the _______ Strike of 1894, the American Railway Union called for a strike which resulted in rail traffic in the West coming to a standstill.
Fill in the blank(s) with the appropriate word(s).
Unlike the gold-driven trade in the rest of the Sudan, the Hausa cities were known primarily for producing what item for trade?
a. iron b. salt c. cotton cloth d. ceramics e. slaves
Fighting at which of the following places started the Civil War?
A) Vicksburg B) Bull Run C) Antietam D) Fort Sumter