Which of the following engineering techniques can help to prevent mass movements?
a. Removing subsurface water
b. Retaining walls and rock bolts
c. both a and b
d. none of the above
Ans: c. both a and b
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HIV/AIDS destroys the __________________ making its victims more vulnerable to diseases such as tuberculosis and pneumonia.
Fill in the blank(s) with the appropriate word(s).
What were the conditions in your hometown during the peak of the last ice-age, 21,000 years ago?
What will be an ideal response?
Which would most affect the components of the hydrologic cycle to the greatest extent for the Earth?
A) A drought in the American Midwest B) A wet year for central Asia C) The onset of an ice age D) The mining of water in the Ogallala aquifer E) The damming of the Amazon River
At present, about ________% of the land surface of the Earth is covered by glaciers.
A. 1/2 B. 2 C. 50 D. 33 E. 10 F. 1