I felt so good about weaving with yarn from Vermont Organic Fiber Company. It was a 50-50% blend of organic Merino wool and organic cotton yarn. It was soft and warm for baby blankets and mufflers. Sustainability determined their price structure: their goal was for participants at every stage of production - from shepherds to the spinning mill - to receive what they need to stay in business, which meant that organic did not cost more. Unfortunately, they sold their O-Wool knitting yarn line and went out of business.
In Norte Chico - currently Peru - in 3000 - 1800 BCE, the Andeans were growing cotton in naturally colored pink, blue, and yellow. I dream of yellow towels and baby blankets in traditional baby colors. We now have organic naturally colored cotton in shades of brown and green. Bamboo also goes through chemical processes to transform the trees' pulp into the silky yarn with a marvelous sheen and hand. Some producers use a more environmentally safe process than others. The good news is that bamboo grows so fast that it's sustainable, but it's not organic or necessarily ecologically safe.
It'd probably be easier if I had one criteria that trumped all others. Maybe Kermit is correct when he says "It's not easy being green."






