Orders of magnitude more expensive. Similarly difficult to remove and manipulate. Nanocellulose aerogel could be a candidate, as most of the processing chemica

Orders of magnitude more expensive. Similarly difficult to remove and manipulate. Nanocellulose aerogel could be a candidate, as most of the processing chemicals can be recovered and reused, and cellulose is abundant, but significant work is needed to give it the same strength and durability to replace styrofoam. In landscaping, it'll also need more treatment against fungus and other things that can eat cellulose. Rammed earth and other more integrative materials should be more popular, imo. Having crap like this geofoam should be considered completely unacceptable, like using baby blood to mix cement.