In 2010, Iceland's Eyjafjallajokull volcano erupted. One of the results was that
A) devastating erosion sculpted the land into large ravines.
B) most cattle and horses were killed by toxic gases.
C) grasses were covered by ash and were unfit for livestock to eat.
D) parasitic diseases spread quickly through livestock populations.
C
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One of the unusual aspects of European imperialism was that the European countries always recognized the national rights of their colonial subjects
Indicate whether the statement is true or false.
Which of the following is a synthetic greenhouse gas?
A) chlorofluorocarbons B) nitrogen C) water vapor D) oxygen E) methane
Monoculture farming ________
A) accounts for less than 1% of U.S. croplands B) is always accompanied by no-till agriculture C) requires no chemical fertilizers or pesticides D) is a development of industrial agriculture E) is typical of Native American farming techniques
Which of the following is NOT a subdivision of the desert biome?
A) Warm desert B) Polar desert C) Tropical desert D) Cold desert and semidesert