Cally recommended, a little while ago, this book, "To Die For", but in a slightly different context as I understood from her post and links. The book got a rave review in The New Zealand Listener, focusing, among other things, on the un-sustainability of cotton.
It has been on my mind, you know, how cotton is grown. I love my commercially-grown, chemically-dyed cottons; I know they come from one New Zealand source who gets it from three sources in Italy, Korea and Taiwan the last time I asked. I also know that textile's country of origin is the country where dyeing took place, or at least so I was told by a Swedish weaver in Picton who had a business in Australia and imported yarns from both countries.)
I never got back to you, either, about what I found out from Claudia about processing bamboo, because the science blew me away and I didn't feel comfortable talking about things I don't fully understand. (Though that's never stopped me from talking about a whole lot of other things, I know.) And the cost of merino seems to be sky-rocketing around me.
I think it's time I started looking into sustainability. The way I see it, I can stick to the yarns I have on hand for the next couple of years, reduce stash at the same time study good yarns, (original material vs end-of-life,) and good sources; sample, and develop a relationship with the source. Then, hopefully by the time I reduce my current stash quite a bit, I can start buying and supporting "good" yarns.
Something like that.