B1
Recycled paper, glass, plastic, etc. has been used before and put through a process so that it can be used again.
Dictionary examples:
My brother made a recycled robot costume. Now he looks like a walking trash can! (0.0)
I wrote my love letter on recycled paper. It smelled like old fish! (0.0)
I bought recycled jeans. They came with someone else's memories in the pockets! (0.0)
recycled paper/plastic (45.2)