If the thought of hair not attached to a body doesn't make you gag,

Matter of Trust has collaborated with thousands of salons throughout the US and abroad to donate their hair clippings which are made into mats that soak up oil spills. ... Pet hair is ok too - but not as efficient.

Sorry, but I think my hair better benefits children with cancer and auto-immune diseases, so I donate mine to Locks for Love. I guess not everyone grows a 9 inch ponytail though.