- From which sources oil can be extracted?
- What are whales?
- What is called blubber and how does it help the whales?
- Where are the Arctic Seas?How is the climate there?
- How is whale oil produced?
- Can it be used for human consumption?
- Which are two types of fish which provide nourishing oil?
- What is the use of halibut and cod oil?
- What kind of oil is used in transportation?
- What is the use of vegetable oil?
- What is the use of animal oil?
- What is the use of mineral oil?
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