It should be noted that machining metal IN PRODUCTION CNC MACHINES is not a very dirty or poisonous process in itself. Nothing is burned, so fumes are basically water vapour. Machining plastics and resins is a different matter, but we very seldom do that. I think that most machine shops recycle the chips, the scrap yard pays for them. All the fluids in the machines are recirculating, nothing goes down the drain. The lube oil is skimmed off and collected by the machines, and recycled. So that's just par for the course for the machining end of things. Anodizing on the other hand is poisonous and fumey and chemically. I commend Chris King on their anodizing. BEST IN THE INDUSTRY and cleanly done. Also, I think that with the new split wedge design, the previously mentioned problems with headsets are a thing of the past.