Using a car causes pollution, and pollution is a damaging excess of contaminants. Given these facts, how do cars damage the environment among the following options:
- Battery useage
 - exposure to the sun
 - Emitting an excess of contaminants
 - they travel great distances
 - Using too much gas
 - Causing accidents
 - depress neuronal excitability
 - within and around


 

   Emitting an excess of contaminants      