HempCrete wall material is not only carbon neutral – it’s carbon negative. Long-time greenies won’t be surprised to learn that the miracle material is actually hemp. Unlike some other eco-friendly building materials, Hemcrete isn’t at all inferior to standard materials. It’s strong and durable, and it’s just as easy to use as standard materials. What’s even better is its versatility: it can be used for wall insulation, flooring and roofing, and it’s fire-proof, water-proof, and rot-proof as long as it’s above ground.