You are presented with the question "what are gases from burning coal and oil dissolving in water in the atmosphere?" and the following answer choices: 
- harmful
 - deadly
 - h2o
 - helpful
 - dangerous
 - vehicles
 - green
 - toxins

Now knowing that gases from burning coal and oil dissolving in water in the atmosphere causes acid rain and acid rain is harmful rain, choose the best answer.


 

 harmful        