Fact 1: Using a car causes pollution.

Fact 2: Harmful emissions from cars are largely responsible for the giant holes in the ozone layer.

Given the two facts above, answer the question "What causes holes in the ozone?" with the following options: 
- Thunderstorms
 - flooding
 - Pollution
 - Sun damage
 - vaporization
 - influenza
 - rays or beams
 - Wind


 

   Pollution      