greencard by roohollah merrikhpour from iran
designer's own words:
have business cards without using any paper and printer or spending any money! Just write your information on the transparent sheet and clip it to the leaves. light cant pass through the black ink and during some days the chlorophylls beneath the ink disappear, and there are letters printed naturally! besides, you can appreciate yourself for being a nature-friend. so clip the thingy to a leaf and wait for the fall!
How to Have a GreenCard?!