You are presented with the question "What can high temperatures cause?" and the following answer choices: 
- hyperthyroidism
 - Dehydration
 - Greenhouse gases
 - chemical reaction
 - global warming
 - contamination
 - Air pollution
 - sweating

Now knowing that high temperatures can cause an object to combust and combustion of fuel is one of the main causes of air pollution, choose the best answer.


 

       Air pollution  