cement

Sea sponges from Wikipedia. By Twilight Zone Expedition Team 2007, NOAA-OE. - NOAA Photo Library: reef3859, Public Domain, Link

Cement substitutes inspired by nature

Concrete stairs, from PIXABAY.COM

Environmentally friendly cement

Hot clinker after leaving the kiln. Image manipulation: Macau500, wikimedia/commons

to build with less greenhouse gases

microspheres. Savannah National Laboratories

Cement that repairs cracks and stores heat energy?