Today, it is almost impossible to recycle clothes woven with mixed fibres. New technology makes it possible to separate the fibres so that they can be recycled.
Patagonia Moving Swiftly Toward Recycled Materials - Fly Fisherman
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Scientists have come up with a technology to recycle used clothes
Polymers, Free Full-Text
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Is Polyester Bad? Scientists Say It Doesn't Have to Be. - WSJ