I remember a rumour from my youth in the late seventies / early eighties, that there was supposedly cadmium in older (relative to that time) LEGO bricks.
LEGO cadmium yields quite a lot of hits, but so far, nothing conclusive.
I also note that LEGO has never recalled any old bricks, which I admit would be next to impossible: how would the general public be able to distinguish between older and newer bricks?
Has cadmium ever been used in LEGO bricks? If so, in what quantities?
How about other toxic metals?