It is believed the most prominent means by which humans add CO2 to the atmosphere is by ________.
A) the burning of coal and other fossil fuels
B) renewable energy
C) nuclear electric power
D) solar power
Answer: A) the burning of coal and other fossil fuels
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_________ organic compounds are released into the environment following an oil spill.
Fill in the blank(s) with the appropriate word(s).
Assume a southerly wind begins to flow over a large lake. At the opposite end of the lake what is the likely direction of this wind?
A. southeasterly B. southwesterly C. northwesterly D. southerly
Almost all Asian countries today have net emigration, meaning they
A) have more people immigrate to their country than those that leave. B) send more people out of their country than they receive from other countries. C) are restrictive about the type of people who can enter their countries. D) are restrictive about the type of people they allow to emigrate out of their countries.
From this cross section of the Grand Canyon, what occurred between the formation of the Precambrian metamorphic rocks and the deposition of the lowest Paleozoic rocks?
A. uplift B. uplift and erosion only C. erosion D. deposition and tilting of the Precambrian sedimentary and igneous rocks E. All of these choices are correct.