What known greenhouse gas is released from manure at large animal feedlots?
A. methane
B. carbon dioxide
C. nitrogen gas
D. ozone
Answer: A
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Which term describes vertical ocean circulation, in which water moves from deep to shallow?
A)surface currents B)deep currents C)downwelling D)upwelling E)gyre transport
Earth is closest to the sun in ____
A) January B) March C) July D) September
Energy conservation in the United States ________
A) can be accomplished by changes in tax laws B) can be improved as individuals make conscious choices to reduce personal consumption C) can be accomplished only through changes in environmental laws D) will be a reality only if there is another major war E) is unlikely to ever occur
Convergent boundaries, due to their geometry, are the sites of the largest earthquakes on Earth.
Answer the following statement true (T) or false (F)