Which of these has enacted regulations that ban hazardous substances if safer alternatives exist?
A. European Union
B. United States
C. Democratic Republic of Congo
D. China
Answer: A
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Which of the following determines the earth's temperature?
A. Energy output of the sun B. Distance from the sun C. Carbon dioxide in Earth's atmosphere D. All options are correct.
With the exception of volcanoes associated with a subduction zone, most volcanic islands are ________ volcanoes
A) cinder cone B) shield C) composite cone D) caldera
The world's total polar bear population is likely to decline by 30-35% by 2050 due to ____.
A. reproductive problems B. over hunting C. loss of habitat and prey D. temperatures too warm for their fur E. DDT in the food chain
What is the speed in meters per second of a deep water wave with a wavelength of 4 meters?
A) 2.5 meters per second B) 3.12 meters per second C) 4.52 meters per second D) 6.24 meters per second E) 20.48 meters per second