POC21 was an innovation camp for open-source sustainability in 2015. 100+ makers, designers, engineers, scientists, entrepreneurs and geeks join forces to prototype a proof of concept of a genuinely sustainable living by applying concepts around a cooperative society and an open-source circular economy. During five weeks of co-living and co-making in a stunning french castle near Paris, the participating 12 projects re-built their hardware prototypes to present them in a final exhibition at COP21. Find the video documentation on the POC21 Vimeo account.