Why Do we reyscle solder?and not throw it away

Recycle? Why not? It's wasteful not to recycle everything you can. My grandfather (who died in 1969) knew this principle all his working life. Even I remember his saying that nothing is endless; we need to be careful. His words are as true now as they've ever been.

http://www.google.com/search?q=recycle+solder&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7GGIE_en