Open dumping is a waste disposal method that is
A. never implemented because of associated risks of groundwater pollution.
B. common in most developed countries.
C. predominant in most developing countries.
Answer: C
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Why are ores so valuable?
A. They are sources of naturally occurring gold. B. They hold many clues to Earth's natural history. C. Metals can be efficiently extracted from them. D. They tend to occur in scenic mountainous regions.
According to Figure 9.8.4, which of the following countries has the highest debt as a percentage of GNI?
A) U.S. B) Canada C) Russia D) China E) Australia
You would be most at risk of danger due to tsunami effects in which metropolitan area of the United States?
a. ?Miami, Florida b. ?Boston, Massachusetts c. ?St. Louis, Missouri d. ?Seattle, Washington e. ?Los Angeles, California.
Scientists use ________ to study past climates, using ________ to reconstruct climates that extend back further than our present instrumentation allows
A) direct measurements; historical records B) proxy methods; climate proxies C) indirect evidence; conjecture D) computer models; algorithms