Let’s imagine for a moment.
A scientist discovers a new insect which can produce a new kind of fiber. But, not just a mere fiber, it comes out as a full sheet of cloth!
Some commercial enthusiasts of the new discovery say that, since there is zero processing cost to take the fiber from rough to thread to cloth sheet, it is a free supply of material. They do acknowledge that setting up a colony of the insects is expensive and the colony covers a broad swath of land.