Natural dyes are a great thing. They are just that, natural, not chemical. I have to applaud Lorna's Laces for doing the right thing, though. They are discovering that the resources they are using to dye the yarn naturally is more detrimental to the earth than just using traditional dyes. They are having to use a mordant, which all natural dyes need to make the dye colorfast. A mordant can be different things and changes the color outcome of your dye. Iron, urea, chromium and copper are an example of a few. Some mordants have the problem of being toxic in and of themselves. Because they were using a mordant there was an extra step in the dye process which used twice as much water as their traditional method of dyeing. And the natural dyes required extra rinses to remove all the dye, using more water still. So, this batch of the Green Line DK we have is naturally dyed, but in the future it won't be. The wool is still organic, that won't change. And isn't it technically MORE green without the natural dyes? I applaud Lorna's Laces for being honest about their use of resources and deciding that they were really going to go green, and not just a facade of being green. It would be great if more companies, across the consumer board, would do this. Selling green and buying green isn't always greener.