Solid Carbon is an ambitious negative emissions technology (NET), also known as carbon dioxide (CO₂) removal, that utilizes existing green technologies to permanently and safely sequester CO₂ as solid rock deep beneath the ocean floor. Led by ONC, the project team comprises Canadian, United States and German researchers, experts and industry partners.

Powered by renewable energy, Solid Carbon aims to remove CO₂ from the atmosphere via Direct Air Capture (DAC) then inject it below the sea floor where it reacts with ocean basalt and mineralizes into rock, providing a vast and permanent reservoir of this greenhouse gas. The technology has the potential to scale globally to reverse the course of carbon dioxide emissions and help meet planetary climate targets.