Using liquid metals to turn CO2 back into coal
https://www.sciencedaily.com/releases/2019/02/190226112429.htm
"To date, CO2 has only been converted into a solid at extremely high temperatures, making it industrially unviable.
"By using liquid metals as a catalyst, we've shown it's possible to turn the gas back into carbon at room temperature, in a process that's efficient and scalable.
"While more research needs to be done, it's a crucial first step to delivering solid storage of carbon."