I came across these fun and eco friendly invitations on Etsy. Two For Joy Paper allows all their designs to be printed on 100% recycled paper stock with the option of 100% kraft recylced envelopes as well. For such a small change you will be doing the environment a big favour and not compromising on the pretty lovely design. Happy days!
Two For Joy Paper on Etsy: www.etsy.com/shop/twoforjoypaper