Inner City Reforestation in Utrecht and the G/Local Amazon; Psychogeography is involved.
If you fold the paper, according to the folks in the image, you get an origami occult dowsing device for use in your drifts.
I have that book too. It is one of the weirder books from my collection. But I had totally forgotten about this flyer. Nowadays it should also say:"Free walking from the fucking bloggers!":-)