Cattle and dairy cows are responsible for producing around 16% of the world's annual emissions of which greenhouse gas?
A. carbon dioxide
B. nitrous oxide
C. carbon monoxide
D. chlorofluorocarbons
E. methane
Answer: E
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What event will eventually move an average star off the main sequence of the H-R diagram?
A. its drift through space due to the gravitational attraction of neighboring giant stars B. solar wind storms C. running out of hydrogen, causing gravitational influx, resulting in core temperatures high enough to begin fusing helium D. surface cooling due to hydrogen loss
Temperatures in Earth's atmospheric layers vary in a zigzag pattern with altitude principally because
A. the density of air varies with altitude. B. air is compressible. C. pressure varies with altitude. D. the chemical composition of the atmosphere varies.
Historical geology is the study of ____________________. Fill in the blank(s) with the appropriate word(s)
In the best-case scenario (strict mitigation), temperatures in the U.S. desert southwest are predicted to rise 5 degrees Celsius by late century
a. True b. False