There is an organization called
Matter Of Trust
that collects dog hair, cat fur, horse hair, wool clippings and human hair to make hair mats and hair booms to absorb and contain oil spills and to use in the cages of oiled birds and other animals.

All you have to do is collect the hair and send it to:

Matter of Trust - Hair Mats Program
c/o San Francisco Carpet Recycling
1588 Carroll Avenue
San Francisco, CA 94124 USA

The pet hair does not need to be shampooed.  They just ask that it's not filthy.  And it does not have to be shaved off the animal.  You can collect hair from the brush and save it up until you have enough to send out.  And the hair can be any length.  This is great for people who would like to donate their hair for a good cause but can't grow it long enough to donate to the cancer wigs for kids organizations (which usually require 10 inches of hair).  It's also a great way for pet groomers and hair salons to dispose of all their hair clippings.

Donate pet hair to help clean up oil spills!  You can see the Matter Of Trust web site below.