> It will be important to prevent the CO2 byproduct from leaking into the atmosphere and contributing to climate change, however. Cemvita Factory argues that it

> It will be important to prevent the CO2 byproduct from leaking into the atmosphere and contributing to climate change, however. Cemvita Factory argues that it can keep the CO2 locked underground, use other microbes to fix it somehow, or find commercial uses for the greenhouse gas… Exactly what solution Cemvita would use in each location—and how successfully—isn’t yet known. Seems like a bit of a dealbreaker to me. CO2 storage is a huge unsolved problem. This is about as close to a climate friendly solution as saying “we’ll do traditional hydrogen and put the CO2 somewhere.” Theoretically fine but not a practical idea at the moment.