The sun set on the disco era decades ago, but polyester is still just as prevalent as ever. Roughly 40 million tons of polyester fiber is produced worldwide each year, and studies have linked some of the chemicals used in conventional polyester to testicular atrophy and early breast development. So we’re excited to learn that scientists at Toray Industries in Japan have developed samples of the world’s first renewable, bio-based polyethylene terephthalate (PET) fiber, which is what polyester is made of. The discovery could open the door to the production of a new type of polyester that is both better for the environment and safer for people.