On the scale of earth-friendly materials, you'd be hard pressed to find two that are farther apart than polyester (not at all) and cork (very). In an unexpected twist, however, scientists are figuring ...

You may own a fleece top or two made from plastic soda bottles. Recycled polyester, or polyethylene terephthalate, known in the industry as PET or just “chip,” is old hat. The US fleece specialist ...