Which erosion control method is most useful in controlling wind erosion of agricultural land?
a. contour farming
b. strip cropping
c. shelterbelts
d. terracing
c
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Which of the following is a problem with using contingent valuation to determine risk?
a. It assumes that people can put prices on everything. b. It follows the full consequences of a risk through an economy. c. It understands how much risk of externalized. d. It accepts higher risk levels than “normal.”
Flowing water experiences friction when it flows along the sides and bottom of its channel
Indicate whether the statement is true or false
Describe how the half-live of radioactive elements can be used to determine the age of rock through radiometric dating
What will be an ideal response?
The sinuous, branching channels that characterize a salt marsh result from
A) animal paths through the marsh. B) the ebb and flow of tides. C) manmade drainage canals. D) storm tracks.