<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What are some things you can do to make lettuce turn brown?
<|assistant|>
Here are some things you can do to prevent lettuce from turning brown:
1. Store lettuce leaves in a cool, dry place to limit degradation of the leaf's natural protective agents.
2. Remove any decaying leaves or any leaves that have started to turn brown.
3. Store the leaves in a sealed bag or container in the fridge.
4. Rinse off lettuce leaves in cold water before using.
5. Keep lettuce away from direct sources of heat, such as heat lamps, ovens, and stoves. 
6. If slicing or tearing the lettuce leaves, do so quickly after harvesting and while the leaves are still cool. 
7. Keep in mind that lettuce leaves tend to brown more rapidly when they have been exposed to bright light or warm temperatures. Try to shade or cool store lettuce when possible.
8. If some leaves begin to turn brown but the bulk of the salad has not, you can use one of several treatments such as a mild chlorine, hydrogen peroxide, or lemon juice to prevent further spoilage.