Regenwasser-Rückhalt: Das Schwammstadt-Prinzip 0 (0) https://www.wien.gv.at/umwelt/parks/schwammstadt.html#:~:text=Schwammstadt%2DPrinzip%20macht%20B%C3%A4ume%20f%C3%BCr,wird%20das%20Regenwasser%20besser%20gespeichert Please rate this initiative Click on a star to rate it! Submit your rating Average rating 0 / 5. Rating count: 0 No ratings so far! Be the first to rate this post.