Of the following G20 countries, the country least dependent on renewable energy is
A) the Unites States.
B) Spain.
C) Portugal.
D) Iceland.
E) New Zealand.
Answer: A
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Acid deposition has been linked to
a. contamination of fish with mercury b. leaching of calcium and magnesium from soils c. releasing ions of cadmium and aluminum into the soils d. weakening trees, so they become more susceptible to other types of damage e. all of these answers
What happens to a mountain root as erosion removes material from the summit?
A. It stays the same. B. It gets deeper. C. It gets shallower.
The 2014 Panel on Climate Change (IPCC) reported that global climate change is
A) certain and that anthropogenic activities are a major factor. B) likely and it is possible that humans are to blame. C) happening in some regions of the world and in some places people may be to blame. D) still unclear and the evidence and the causes of change require additional studies.
A mixture of HOT gas, ash and volcanic debris travelling at high speed is called:
a) pyroclastic flow b) mud flow c) debris flow d) lava flow e) lahar