I try to make sure that every single scrap of recyclable material is recycled.  From oil & coolant to plastic coolant bottles, used timing belts, cardboard and scrap metal.  I make an extra effort to ensure that these materials don't go to waste or contribute to pollution.  In some cases I can actually create something useful out of this stuff.  For instance my injector puller slide hammer is made form a cylinder head bolt and a used ALH large timing belt roller.  If any of you have a good idea what I can do with all these used timing belts, I'm all ears.