Primary treatment of wastewater includes
a. treating water with chemicals.
b. stirring and aerating water.
c. degradation of wastes by bacteria.
d. physical removal of contaminants.
Answer: D
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Major differences and often conflicts between highland and lowland inhabitants are common and are a part of regional history in many areas of the world. An example highland peoples at conflict with lowland peoples are the:
A) Kurds B) British C) French D) Canadians
Thunderstorms occur year-round in the:
A) subarctic regions. B) middle latitudes. C) subtropics. D) polar regions. E) tropics.
Of the Indo-European language family, Romance, Germanic, and Slavic are the three main branches of European languages
a. True b. False Indicate whether the statement is true or false
Over ________ of volcanism is associated with the edges of tectonic plates.
A. 50% B. 90% C. 80% D. 60% E. 70%