• 1. 
    Which of the following gases does not play a part in the greenhouse effect?

  • water vapor
  • nitrogen
  • carbon dioxide
  • methane
  • 2. 
    So far, most of the strongest impacts of climate change have been observed in:

  • the tropics
  • all latitudes equally
  • southern latitudes
  • northern latitudes
  • 3. 
    The average American contributes approximately how much CO2 to the atmosphere per year?

  • 10 tons
  • 50 tons
  • 20 tons
  • 1 ton
  • 4. 
    Which renewable energy source contributes the most energy to the U.S.?

  • geothermal
  • wind
  • hydropower
  • solar
  • 5. 
    What percentage of scientists agree that climate change is likely generated by human activities?

  • 97%
  • 37%
  • 50%
  • 100%
  • 6. 
    The likelihood of which extreme weather event is expected to increase with climate change?

  • droughts
  • heat waves
  • hurricanes
  • all of these
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