You are presented with the question "Heating with coal can cause " and the following answer choices: 
- Electrical energy
 - chemical reaction
 - automobile exhaust
 - Something to move
 - air pollution
 - distracted driving
 - electric outages
 - Dehydration

Now knowing that coal is used for generating heat by burning and coal burning can cause air pollution and generate carcinogens, choose the best answer.


 

     air pollution    