All of the following are useful for increasing soil fertility except
A. addition of manure.
B. addition of fertilizer.
C. crop rotation.
D. addition of iron oxide.
Answer: D
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The physical environment can affect human activities in many ways
Indicate whether the statement is true or false.
How do you think the city might make up for this shortfall? What will be an ideal response?
Cap-and-trade is a system that ________
A) permits industries that pollute at levels below the federal cap to sell credits to industries that pollute at levels above the cap B) rapidly brings pollution emissions to near zero for participating industries C) specifies a certain cap on industrial pollutants that can be traded to other nations D) allows industries to set their own levels for pollution emission so trading can continue E) has been repealed by Congress as useless in diminishing pollution
Which of the following textural terms describes the texture of nonclastic chemical sedimentary rocks?
A) Sand-sized B) Crystalline C) Gravel-sized D) Angular