Over the past 12,000 years, the greatest loss of biological wealth has resulted from the
A) conversion of natural ecosystems to modern agriculture.
B) movement of human products down rivers and across oceans.
C) extraction of oil and mineral from reserves buried deeply underground.
D) use of deep aquifers, lakes, and rivers as sources of freshwater.
A
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Which of the following is the primary source of energy for the Earth's atmosphere?
A. latent heat released during the formation of hurricanes B. the sun C. erupting volcanoes D. energy from within the Earth
The lithosphere floats atop the
A) mantle. B) crust. C) asthenosphere. D) mohorovicic.
The western margin of North America is an active subduction zone except for the zone along the
Cascade Mountain Range that is a transform fault boundary. Indicate whether the statement is true or false.
The 1989 Loma Prieta and 1995 Kobe earthquakes both illustrated the problem that laws designed to regulate construction in seismic-hazard areas typically do not require "retrofitting" of older structures.
Answer the following statement true (T) or false (F)