Although the Green Revolution has greatly reduced world hunger and malnutrition, it has
A) doubled the amount of land used to raise crops.
B) not significantly increased the productivity of modern agriculture.
C) required high levels of increasingly expensive fertilizer and pesticides.
D) contributed significantly to the destruction of the ozone layer.
C
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Once salt is dissolved in water, the
A) negatively charged sodium cation is surrounded by the negative side of encircling water molecules. B) positively charged sodium cation is surrounded by the negative side of encircling water molecules. C) positively charged sodium cation is surrounded by the positive side of encircling water molecules. D) positively charged chlorine cation is surrounded by the positive side of encircling water molecules.
Compared with soils beneath built-up areas, soils beneath a forested watershed will generally
A) reduce surface runoff. B) become compacted more quickly. C) be more likely to flood. D) be more likely to shrink and swell.
When soil is eroded from farmland,
A. new soil quickly forms replacing that which is lost. B. the nutrient-rich topsoil is least affected. C. crop yields and crop nutritional quality may be reduced. D. All of the choices are correct.
One of the world's largest cities, Mexico City, is located on one of the least favorable places to build a city
Indicate whether the statement is true or false.