Which one of the source categories listed below is responsible for the most pollution?
A) solid waste disposal B) industrial processes
C) electric utilities D) transportation
D
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When rivers flow over a fairly uniform substrate with a uniform initial slope, they usually develop what type of drainage pattern?
a. Arc-shaped network b. Perpendicular network c. Dendritic network d. Parallel network
There is evidence for overfishing since approximately ________.
A. the 1970s B. 1000 years ago C. the late 1700s D. the early 1900s E. the mid-1800s
Along an advancing cold front, warm, moist air is abruptly lifted, often resulting in the formation of cumulonimbus clouds
Indicate whether the statement is true or false
Which of the following is a key part of the formation of most natural arches?
A. volcanic eruptions B. jointing and other fracturing C. spheroidal weathering D. folding of soft rock layers E. None of these choices are correct.