That being said, I decided to share one way crafters can recycle, no matter what it is you make/send to customers. Of course, this works better if you HAVE customers, but most people who sell on Etsy have some kind of customer base, so this applies. :)
When you buy something on Etsy, most people will send some kind of a card with it, whether it simply be a Thank You card, or just a little nice note to say thanks, tell you about the item, or to offer their web url for futre transactions.
(A card I received with a bought item recently)
I generally keep these cards, and when it is time for me to send something to someone else, I simply recycle the card for my own purpose. I will cut and paste a paper block on the inside of the card and write my own message on it,
add a little design,
and maybe even a sticker to make it more "mine".
And there you have it... a card all your own, but recycled! There are tons of little ways to "Keep it Green"... all it takes is a little thinking, a little creativity, and some time, and you've done your part! :)