There are two types of cardboard—corrugated and paperboard—and they can both be recycled. Corrugated cardboard is made of multiple layers to create a durable and strong packing material. Paperboard is ...

Add Yahoo as a preferred source to see more of our stories on Google. wet box on the floor (panchof via Getty Images) Be honest, have you ever left a cardboard box outside, and then later put it into ...