you guys watch "how it's made" on the discovery channel, right? (here in the u.s. and prolly canada)
tonight i watched "program 13; bicycle helmets, lithium batteries, car brakes, aluminum (or "aluminium" for youze british people). fascinating. too bad they can't go into (much) greater detail.
here in s.e. new york state the Discovery Channel usually plays two episodes back to back. (also saw "fire trucks, thermo-formed glass, pvc gloves." came in late and missed the part about wind generators.)