What are the three most far-reaching effects of underground mining? What will be an ideal response?
The three most far-reaching effects of underground mining are ground subsidence, the collapse of the
overburden into mined-out areas, and acid mine drainage. Acid mine drainage is generally considered
to be the most serious of the three
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Which of the following was not an impact of the Mount Pinatubo eruption in June 1991?
A) A decrease in atmospheric aerosols B) Injection of 15 - 20 million tons of sulfur dioxide droplets into the stratosphere C) Worldwide transport of aerosols D) A temporary average cooling of 0.5° C (0.9° F) E) Increase in atmospheric albedo
The most common use of bioremediation has been to assist in the cleanup of ________
A) PCBs B) heavy metal contamination sites C) herbicide and pesticide over-application D) non-biodegradable chemicals E) oil spills
A low-oxygen level in the Gulf of Mexico ________.
A. kills most bottom organisms, is responsible for a decline in Gulf fisheries, and has been linked to excess nutrients supplied by the Mississippi River B. has been linked to excess nutrients supplied by the Mississippi River C. is responsible for a decline in Gulf fisheries D. kills most bottom organisms E. kills most bottom organisms and has been linked to excess nutrients supplied by the Mississippi River
World-systems theorists such as Wallerstein argue that an artificial division of labor has made earning a good income from free trade difficult for most
A) countries and corporations. B) transnational corporations (TNCs). C) multinational corporations (MNCs). D) more developed countries (MDCs). E) less developed countries (LDCs).