Why is water vapor not implicated in climate change as methane and carbon dioxide are?
A. The concentration of water vapor in the atmosphere has remained relatively constant despite changes in human activities.
B. Water vapor is a liquid, not a gas, so it precipitates out of the atmosphere frequently.
C. Water vapor is not a greenhouse gas.
D. Carbon dioxide and methane are not just greenhouse gases, they are also toxic to most organisms.
Answer: A
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Sustainable water resources in the future will require:
a. increased efficiency of irrigation b. greater crop yields c. restriction of groundwater withdrawals to sustainable levels d. all of the above
The ability of an ecosystem to recover quickly from a disturbance and return to its original state is known as
A) punctuated equilibrium. B) resilience. C) vicariance. D) succession.
Water protected from direct wave influence behind a breakwater can be placed in motion by wave ________.
A. reflection B. refraction C. diffraction D. All of these are correct. E. None of these is correct.
At the places where 180 degrees of longitude and the International Date Line meet, there is a change of ________ as you cross the International Date Line
A) season B) hour C) year D) day E) day and time zone