Why has the Sahel been a focus of attention in recent times? What will be an ideal response?
This is an area of human-induced desertification where there is a delicate balance between survival and
disaster. Poor farming and grazing practices in combination with prolonged drought have caused
deterioration of the land. It is the famine resulting from this that has attracted the world's attention.
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Glass is rather opaque to ________ radiation.
A. only intermediate-wavelength B. long-wavelength C. all wavelengths D. short-wavelength
________ transport(s) materials directly after they are loosened by splash erosion
A) Stream flow B) Gully erosion C) Rill erosion D) Sheet erosion E) Earthquake slumps
What percentage of the residents of dispersed urban areas in the United States drive alone to work every day?
A. 5% B. 16% C. 34% D. 52% E. 76%
The Neutral Gator Initiative is a nonprofit organization that works to reduce ________ emissions in Florida
A) carbon B) acid rain C) nitrogen D) silicon E) nitrogen dioxide