Soil erosion is a significant contributor to this
A. ground water recharge.
B. deforestation.
C. global warming.
D. storm water runoff pollution.
Answer: D
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What does voyaging offer people?
a. Expansion of trade b. Increased availability of food c. Mobility of residence d. All of these choices
Answer the following statement(s) true (T) or false (F)
1. Concerning energy use, “getting more” is challenged by the difficulty of changing individual habits 2. Release of carbon dioxide from the burning of fossil fuels is the biggest and best known contributor of greenhouse gases. 3. Increase in “ozone hole” leads to increase in skin cancer rates. 4. A 2006 study found that over 160,000 Americans die prematurely each year due to fine particulates.
Which of the following statements is NOT true regarding the Earth system?
A. Earth's life forms are dependent on the system. B. It is dynamic and interactive. C. It is affected by other bodies in the solar system. D. Humans are not capable of affecting the system. E. It consists of several sub-systems.
The Big Bang refers to
A. the creation of the moon. B. the origin of the heavy elements in a supernova. C. the creation of the solar system. D. the origin of the Universe. E. None of these choices are correct.