Which of the following is one of the major pollutants of groundwater?
A) acid rain
B) fertilizers from agricultural fields
C) treated sewage from cities
D) carbon dioxide
E) home garbage
B
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What does a phaneritic texture tell us about the history of an igneous rock? What will be an ideal response?
Many of the 1.3 billion people who lack electricity live in rural regions where
A) nuclear energy is most useful. B) hydroelectric energy is the best energy resource. C) hydrogen fuel cells are most useful. D) solar energy is most useful.
What are the main economic activities of subarctic climate of Canada?
a. medical supply production and fishing b. medical and pharmaceutical supply production c. oil and natural gas extraction d. fishing and logging e. hydropower, logging, mining
What happens to snowflakes as they become progressively buried within glaciers?
A. They can become brighter white because of trapped air. B. They become less dense because of large amounts of trapped air. C. They begin to melt as they are insulated from the cold air. D. They become interlocking crystals of ice. E. All of these choices are correct.