3. Answer
ALL parts of this question.
(a) Explain how greenhouse effect raises the temperature of the
troposphere.
(5 marks)
(b) N2O is a greenhouse gas. Draw the IR active
vibrations of N2O. The frequency of the bending
vibration is 596 cm-1, calculate the wavelength of light
that N2O can absorb due to this vibration (show your
working).
(c) Discuss what is meant by the term “global dimming”.
(2 marks)
(d) Explain why chlorofluorocarbons make a significant
contribution to...