Fact 1: Treating water is used to remove harmful substances before drinking.

Fact 2: Bottled water is often treated.

Given the two facts above, answer the question "what does bottled water have none of?" with the following options: 
- energy barrier
 - cloudy and rainy weather
 - harmful substances
 - layers of fat
 - energy usage
 - Brutal temperatures
 - Heat energy
 - hard outer covering


 

   harmful substances      