Following is a transcript of the video. Narrator: Argan oil can cost as much as $300 per liter, making it the world's most expensive edible oil. Just 20 years ago, however, the production of argan ...

Narrator: Coconuts have been cultivated in tropical climates for thousands of years, and they produce some of the most expensive cooking oil. Coconut oil can sell for around 12 times he price of ...