This is a doubly fascinating article. The lede on it which got Instapundit attention was the carbon sequestering properties of the new cement (current cement generates tons of CO2, this new cement REMOVES C02 from the atmosphere), but equally as interesting is the “printing buildings” concept that is presented here, showing that concept to have left the realm of futurism and is entering the mainstream.
As they say in the article, we build so many buildings in the world that this approach would literally let us BUILD our way out of any supposed man-made CO2 crisis. It is likely that most people have no idea how much CO2 is produced by current cement making processes.
Next Big Future: Carbon sequestering in cities, Calera cement, and maybe Vinod Khosla first trillionaire in 2020
Converting the world cement industry to cement that removes CO2 instead of adds it would be a reduction 5 billion tons of CO2/year. The entire US production of CO2 is now 6 billion tons. The Al Gore proposal of de-carbonizing all US electricity generations was a plan to remove 2.4 billion tons of CO2 generation per year.