Which of the following statements about shifting cultivation is most accurate?
A) Shifting cultivation is not sustainable.
B) Shifting cultivation is sustainable.
C) Shifting cultivation can be sustainable if the population is small enough for the land area available for this agricultural system.
D) Shifting cultivation is no longer practiced.
E) Shifting cultivation is usually practiced in the middle latitudes.
C
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Which of the following does NOT share religious and regional roots with the others?
A) Islam B) Buddhism C) Sikhism D) Hinduism E) Both Sikhism and Hinduism
A skydiver steps from a high-flying helicopter. As her velocity of fall increases, her acceleration
A. decreases. B. increases. C. remains unchanged regardless of air resistance. D. need more information.
Which of the following represents an alarming positive feedback loop of global warming?
A) Increasing temperatures raise humidity, which further increases temperatures. B) Decreased pH of the ocean increases the rate at which carbon dioxide is absorbed by the oceans from the atmosphere. C) Increased use of fossil fuels adds ozone to the stratosphere, which traps more heat. D) Increased levels of atmospheric carbon dioxide decreases photosynthesis, which further increases atmospheric levels of carbon dioxide.
Smoking cigarettes is considered a national pastime in Russia, where 60% of men smoke
Indicate whether the statement is true or false