Hair Put in Garbage Cart/Bin Ways to Reduce Compost Your Hair Hair that is not long enough to be donated can be composted. If hair ends up in waste piles, it will probably be burned and release toxic gases, which are damaging to the environment and human health over time. Ways to Reuse Give It to the Birds Birds will use hair to make their nests. If you leave hair out in the backyard for a few days they’ll likely use it. This is a great option for animal hair as well. Did You Know? Hair Can Be Turned Into a Biofuel Human hair, as well as other fibers like chicken feathers, can be broken down and processed into bioplastics and biofuel. Designer Thomas Vailly created a human hair bioplastic that “resembles leather” and could be a useful alternative to other single-use plastics. Read more.