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

Fact 2: Acid rain is harmful rain.

Given the two facts above, answer the question "what are gases from burning coal and oil dissolving in water in the atmosphere?" with the following options: 
- harmful
 - deadly
 - h2o
 - helpful
 - dangerous
 - vehicles
 - green
 - toxins


 

 harmful        