Sustainable agriculture has many goals. One of the primary goals is best described as ________
A) converting forestland into productive cropland
B) converting desert land into productive cropland because of the growth in desalinization technology
C) increasing the use of chemical fertilizers and pesticides
D) making an effort to maintain productive topsoil
E) encouraging the growth of large-scale agribusiness because it is the most economically viable form of agriculture
D
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A(n) ____________ is a ring-shaped island built of calcium carbonate enclosing, or almost enclosing, a shallow
lagoon from which no land protrudes. Fill in the blank(s) with the appropriate word(s).
Of the following, ________ are pioneer species
A) aspen trees B) beavers C) wolves and mountain lions D) lichens E) zebra mussels
As the first wave of a tsunami retreats from the shore, bystanders should expect a second wave within approximately ____
a. ?15 minutes b. ?two minutes c. ?one hour d. ?twelve hours e. ?two days
Impacts of global warming include all of the following except ________
A) rising sea levels B) earlier migration of fish and birds C) more human illness D) decrease in mortality because winter is warmer E) more extreme weather