In our Interviewing the Experts series, the International CCS Knowledge Centre asks global CCS experts about their experiences, opinions and critiques on the evolving industry landscape. In our second video, Katherine Romanak walks us through the process of geological carbon storage, sharing one of her favourite metaphors to make the process understandable to anyone. She also discusses the process‑based soil gas approach to baseline monitoring and ends with a candid look at the policy frameworks needed to support large‑scale geological storage while ensuring that science is applied effectively in real‑world decision‑making.