Living walls and self-healing concrete are the future of architecture

Concrete is the most widely used structural material on the planet, but it has a niggling habit of breaking down over time, giving rise to cracks, pits and holes that require expensive repairs or replacement. But what if concrete could mend itself? It turns out such a material already exists - and it could be used in… » 11/02/12 1:40pm 11/02/12 1:40pm