I'm just wondering, in terms of the chemistry, what chemicals were there and what is there now? There always has to be a surfactant in there. There used to be heavy metals and now there are not. Chemically, what changes have occurred?
February 12th, 2013 / 5:20 p.m.
Liberal
Ted Hsu Liberal Kingston and the Islands, ON
I'm just wondering, in terms of the chemistry, what chemicals were there and what is there now? There always has to be a surfactant in there. There used to be heavy metals and now there are not. Chemically, what changes have occurred?
See context to find out what was said next.