Transparent wood - is said to be as strong as glass but conducts heat at a rate five times lower than that of glass.
There is still a way to go to improve the environmental credentials of the production process.
This is a fascinating concept that scientists believe holds great potential.
https://arstechnica.com/science/2023/12/why-scientists-are-making-transparent-wood/
https://www.annualreviews.org/doi/10.1146/annurev-matsci-010622-105440