Fact 1: Gases from burning coal and oil dissolving in water in the atmosphere causes acid rain.

Fact 2: Acid rain comes from polluted clouds.

Given the two facts above, answer the question "Gases from burning coal and and oil dissolving in the atmosphere can cause what?" with the following options: 
- polluted rain
 - disease
 - humidity
 - thunderstorms
 - snow
 - contamination
 - Temperature
 - harmful substances


 

 polluted rain        