Which of the following, taken by itself, represents a net warming ...

[s.tung]

Which of the following, taken by itself, represents a net warming effect in the atmosphere?
 
  A) Sulfates released from burning of fossil fuel
  B) Black carbon emissions from the burning of diesel fuel
  C) All aerosol emissions
  D) Fine volcanic ash from eruptions
  E) Impacts of asteroids

Question 2

A lack of sunspots has been used as an explanation for ________.
 
  A) the Ice Age
  B) Little Ice Age
  C) a lack of aerosols in Earth's atmosphere
  D) changes in the Earth's orbit
  E) global warming

[bblaney]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: B