Sustainable agriculture in the long term will require
A) increasing meat consumption in India and sub-Saharan Africa.
B) decreasing the use of fossil fuels and synthetic fertilizers.
C) releasing more greenhouse gases than are released at present.
D) expanding the type of agriculture presently used in developed nations to Africa and southeast Asia.
B
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In 1950, 2/3 of the world's 30 largest cities were located in core countries
Indicate whether this statement is true or false
Earth's interacting subsystems or "spheres" are the
A. lithosphere, atmosphere, hydrosphere, biosphere, and ecosphere. B. lithosphere, hydrosphere, atmosphere, and biosphere. C. lithosphere, hydrosphere, and atmosphere. D. biosphere, lithosphere, and atmosphere.
According to the Koeppen system, an A climate is one in which
A) potential evaporation exceeds precipitation. B) the average temperature for all months is greater than 18 degrees C. C) the coldest month of the year has an average temperature higher than -3 degrees C, but below 18 degrees C. D) all months have mean temperatures below 10 degrees C.
Felsic rocks contain about ________% silica.
A. 10 B. 65 C. 25 D. 80 E. 70