How do nitrogen and chlorine catalyze the destruction of ozone? ...

[mynx]

How do nitrogen and chlorine catalyze the destruction of ozone?
 
  What will be an ideal response?

Question 2

What specific differences in global warming policy are advocated by William Nordhaus and Nicholas Stern?
 
  What will be an ideal response?

[joanwhite]

Answer to Question 1

Nitrogen eliminates ozone through the following cycle:

NO + O3  NO2 + O2
NO2 + O  NO + O2
Net: O + O3  2O2

Likewise, chlorine eliminates ozone through the following cycle:

Cl + O3  ClO + O2
ClO + O  Cl + O2
Net: O + O3  2O2

Answer to Question 2

Nordaus uses a much higher economic discount rate in his analysis than does Stern. Hence, Nordhaus advocates a relatively small carbon tax, whereas Stern advocates a much larger one. Both economists believe that a tax on carbon would be the most efficient way to push society into reducing CO2 emissions.