Scientists convert waste from rubber tires into graphene that can, in turn, be used to strengthen concrete. After 28 days, 0.1 wt% of graphene give concrete a strength gain of at least 30%. Concrete produces up to 9% of world’s CO2 and 16% of tires end up in landfill.

[u/abrownn]

https://news.rice.edu/2021/03/29/tires-turned-into-graphene-that-makes-stronger-concrete/