Which of the following is a pollutant at the regional scale?
A) carbon dioxide
B) carbon monoxide
C) sulfur oxides
D) particulates
E) chlorofluorocarbons
Question 2
The increase in Earth's temperature caused by carbon dioxide trapping radiation is
A) thermal feedback.
B) isothermic depletion.
C) the greenhouse effect.
D) photochemical smog.
E) the anaerobic process.