- 10 years agoFavorite Answer
If you mean what part of a dollar bill is made from recycled materials, the answer is about 75%.
The "paper" used to make US currency is made from 75% cotton and 25% linen. The company that makes the paper, Crane & Co. buys the scrap and off-cut material from jeans makers like Levi Strauss and uses that for the cotton portion. Since that material would otherwise be waste in the jeans manufacturing process, it's considered recycled.
If you're talking about what happens to bills when they are no longer fit to use, those notes are shredded, and can be used by companies in things like the manufacture of roofing tiles or insulation. The same thing is done with notes that are damaged during the printing process. Other than "novelty" items like small bags of the stuff, the Bureau of Engraving and Printing doesn't sell shredded currency to individuals.