Mail that has been irradiated cannot be recycled, a new study has found. The study, released last month by the Postal Service, concluded that the irradiation process erodes paper fibers, meaning ...

Embed <iframe src="https://www.npr.org/player/embed/1137330/137330" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player"> Host ...