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

Fact 2: Acid rain kills trees .

Given the two facts above, answer the question "what does gases from burning coal and oil dissolving in water in the atmosphere do?" with the following options: 
- chemical changes
 - saves trees
 - forms diamonds
 - vaporization
 - heating liquids
 - kills trees
 - weathering
 - Pollution


 

      kills trees   