increase the production of ozone. decrease the production of smog. increase the emission of nitrogen. decrease the emission of carbon dioxide.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Many cars are equipped with a catalytic converter, a device that helps remove hydrocarbons and oxides from car exhaust. As a result, this device helps to
Possibilities:
- increase the production of ozone.
- decrease the production of smog.
- increase the emission of nitrogen.
- decrease the emission of carbon dioxide.

decrease the production of smog.