Fact 1: Coal is used for generating heat by burning.

Fact 2: Coal burning can cause air pollution and generate carcinogens.

Given the two facts above, answer the question "Heating with coal can cause " with the following options: 
- Electrical energy
 - chemical reaction
 - automobile exhaust
 - Something to move
 - air pollution
 - distracted driving
 - electric outages
 - Dehydration


 

     air pollution    