Green tech: dyeing fabric without gallons of pollution.

"It takes between 25 and 40 gallons of water to dye 2.2 pounds of fabric. Multiply that by the millions of T-shirts, track pants, and other textiles made each year, and you get two huge environmental problems: millions of tons of chemical-laden wastewater and depletion of freshwater.
Instead of H₂O, DyeCoo’s process uses supercritical carbon dioxide, which has fluidlike properties. The fabric absorbs nearly all the dye while generating no wastewater, and 95 percent of the CO₂ is recycled into the next batch. Plus, reduced energy and chemical use cuts production costs 30 to 50 percent. Nike, which has a partnership with DyeCoo, used it to dye an Olympic singlet for Kenyan marathoner Abel Kirui, and Adidas put its first 50,000 DryDye T-shirts on sale this summer."

http://www.popsci.com/bown/2012/product/dyecoo-textile-systems
http://www.dexigner.com/news/25160