Alternative energy sources that are often called "new renewables" include ________
A) solar, wind, and geothermal
B) coal and natural gas
C) fusion and fission
D) wind, wood, and alcohol
E) hydropower and biomass
Answer: A
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Investment in improved transportation and communication systems is usually done with the intent to
A) increase economic growth. B) increase tax revenues. C) increase transportation costs. D) increase regional divides.
Which important agricultural substance comes from the atmosphere?
a. nitrate b. phosphate c. potassium d. potash e. calcium
When naming clouds, the term "stratus", or "strato", means ____ clouds
A) thick B) storm C) low altitude D) layer
When populations of two different species interact over long periods of time, changes in the gene pool of one species can lead to changes in the gene pool of the other. What is this called?
A. competition B. coevolution C. parasitism D. commensalism E. mutualism