Great ideas and initiatives during the Makathon in Haarlem around water technology and nature preservation… https://t.co/oYb9EYfbmc

Great ideas and initiatives during the Makathon in Haarlem around water technology and nature preservation @3dmakerszone @PWNwaternatuur http://pic.twitter.com/6EY6umFCSG

— ☁suɐɥ ɟǝoq☁ (@HansB001) October 5, 2017

from Twitter https://twitter.com/HansB001