We all know what happens when someone doesn't wash their hair regularly.
It's less than flattering.
Interestingly enough, the undesirable process by which hair absorbs oil can be used for good.
Matter of Trust, a non-profit charity, is using human and animal hair to assist in the clean-up of the gulf coast oil spill.
The donated hair can be woven into hair mats, or stuffed into nylons and placed along the coast to soak up the oil.

I find the whole thing slightly disgusting, yet oddly fascinating.
Matter of Trust is currently asking for people to sign up to be in their reserves, ready to mail in hair, fur and wool when asked. Donated nylons are being accepted at any time.
I found the least gag-inducing photo possible here