an OSHA approved HAZ MAT container
They might explode!
In an approved container.
Usually feta is stored in oil.
If it's a tin can, it will keep the oily rag from catching fire. If the rag catches fire, the can will contain it safely, but the idea is that won't happen at all.
There should be a special bin set aside for the disposal of oily rags. Do not throw the oily rag into the water. What to do should be stated on a noticeboard of rules and regulations.
Many different types of oils are prone to spontaneous combustion. Limiting the airflow will limit the reaction. That's the short answer. If you are using rags soaked with materials prone to spontaneous combustion, such as linseed oil, varnishes, stains, etc..; you should store them in tightly closed containers or waterfilled containers.
chicken nuggets
Every plant has an oily top to the leaf for waterproofing so all trees should have this.
the black oily kind
Head and Shoulders has a certain kind just for oily hair, it's at any drug store or grocery store, and it is cheap!
You store them in a sealed container to prevent them from igniting. The oil and the air create a chemical reaction which creates heat, so after the oxygen is spent in the closed container, the process cannot be completed, therefore no fire.
It depends on what kind of skin you have. (Oily, dry, combination, etc) See a dermatologist to see whats right for your skin type. There are many different types of acne treatments such as topical treatments or pills.