What are some benefits about the fact that oil goes to the top in water?

Oil spills are easy to clean, water is easier to purify to a drinkable state, and it makes the bottles of salad dressing in the grocery store look pretty cool.What are some benefits about the fact that oil goes to the top in water?
It can be easier to clean an oil spill. It can also be used to create an anaerobic system in water by creating a barrier between the water and air.What are some benefits about the fact that oil goes to the top in water?
You can see that it has a density lower than that of water. If there are oil spills the oil will not sink and kill many animals.

vincent