Which of the following is not a theory supporting global warming?
  • Carbon dioxide is an insignificant greenhouse gas.
  • Australia
  • respiration
  • Steady surface temperature increases were noted between the 1970's and 90's.
Which of the following continents was not covered by ice during the Pleistocene ice age?
  • Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
  • respiration
  • Australia
  • Carbon dioxide is an insignificant greenhouse gas.
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