Construction with rice waste

“Rice husks protect the precious grains from wind and rain, and their high silica content allows them to resist moisture and decay, meaning they naturally boast the same properties as many traditional construction materials. "The whole point of the rice husk is to protect the rice while it grows," Guimond says. "What is it protecting it from? Moisture, pests, rot, those types of things." 

In addition to protecting against moisture, the high silica content means rice husks are surprisingly resilient to fire, according to Fine. Modern Mill's product is designated as Wildland Urban Interface (WUI) compliant, meaning it has passed California's fire safety testing.”

https://www.bbc.com/future/article/20261009-the-houses-made-from-rice-husks

A paper from the Bluesky discussion where I saw the article

https://www.mdpi.com/1996-1944/18/15/3534