Almost everything we build (houses, buildings, bridges) depends on a material that we use without thinking too much, cement, true? It is so common that it seems inevitable, but its impact is enormous, just its production generates around 8 % of the world’s CO₂ every year. Eight percent!! But, there is a new material that is stealing the show… cardboard and paper, the same ones that end up in the trash everyday. We pollute by producing cement while wasting materials that could be used to build. But, wait, Laura, how can we use paper and cardboard in construction? Okey, let’s...