Until regulation of air pollution began in the 1950s, the greatest influence on emissions of air pollutants was/were:
A) lack of education about pollution's ill effects.
B) macroscale atmospheric changes.
C) both economic conditions and population growth.
D) poor technology.
C
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Which of the following amino acids can coordinate to a metal ion?
A) arginine B) glutamic acid C) isoleucine D) phenylalanine
John James Audubon described a single flock of ____ of perhaps a billion birds, which took three days to travel past him and darkened the skies.
A. Carolina parakeets B. starlings C. sparrows D. passenger pigeons E. California condors
When the voltage across a steady resistance is doubled, the current
A. is quadrupled. B. is doubled. C. is half. D. remains the same.
Ice cores record both the record of past temperatures, and also the causes of climate change
a. true b. false