The "year without a summer" may have been caused by ____.
A) soot from coal fires
B) particulate matter and gases from volcanoes
C) a dust cloud produced when a meteorite collided with the earth
D) deforestation
Correct Answer:
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Q4: Over the past 100 years or so,it
Q15: The Sahel _.
A) is mostly a sand-covered
Q16: The most recent North American glaciers reached
Q19: Presently, ice sheets and glaciers cover _
Q21: Plate tectonics "explains" certain climatic changes by
Q22: Climate models predict that if average global
Q23: During a period when the earth's orbital
Q27: It now appears that if global temperatures
Q28: It is now known that,overall,clouds
A) have a
Q32: A biogeophysical feedback mechanism in the Sahel
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