Although coal is an abundant fuel, when burned it produces very high _____________________ emissions.
Fill in the blank(s) with the appropriate word(s).
Right answer summary: carbon dioxide
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By 1900, white-tailed deer populations in the United States were drastically reduced, but now, since laws have been passed to protect them and their natural predators, their population has ____.
A. moved more deeply into wilderness areas B. been reduced even more C. stabilized D. exploded E. succumbed to hunting pressure
Landfills differ from open dumps in that
A. Landfills and dumps are the same thing B. Landfills are smaller C. Landfills are cheaper to operate D. Dumps are cleaner and smell less E. Landfilled waste is compacted and covered
Describe how glaciers fit into the hydrologic cycle. What role do they play in the rock cycle?
What will be an ideal response?
The greatest diversity is found in which of the following groups of organisms?
A. plants B. vertebrates C. invertebrates D. birds