What is meant by carbon sequestration?
A. Carbon is released from melting permafrost.
B. Carbon is removed from the surface environment and placed in storage.
C. Excessive amounts of carbon dioxide are released into the atmosphere by volcanic activity.
D. Heat is absorbed by atmospheric carbon dioxide.
Answer: B
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_____ reefs were dominated by crinoids, blastoids, lacy bryozoans, brachiopods, and calcareous algae
A)Carboniferous B)Cambrian C)Permian D)Devonian E)Ordovician
These types of clouds make the Sun appear as a dimly visible round disk
a. altocumulus b. cirrostratus c. altostratus d. cirrocumulus e. cirrus
Wave refraction:
a. is the suspension of sediment by a breaking wave. b. is caused by swash and backwash. c. occurs because of rip currents. d. occurs in the offshore zone. e. causes erosion of headlands and deposition in embayments.
The Millennium Ecosystem Assessment primarily characterized human impact on
A) atmospheric carbon dioxide levels. B) degradation of the ozone layer. C) ecosystem services. D) plate tectonics.