My grandmother kept a jar of North Sea water on her windowsill. She never explained it. Some knowledge lives below the threshold of language — held in glass, sealed, waiting for the right question.
I am a chemist. I was taught that everything can be named — every bond, every collision, every invisible tremor of energy passing between one state and the next. But chemistry also taught me the thing it does not advertise: that some reactions cannot be undone. That what is released into the world does not vanish because you have closed the laboratory door and gone home. The atmosphere is a long memory, patient and indifferent as a jar on a windowsill.
When I learned I would cross the Atlantic for the first time — St Andrews to Boston, the grey Fife coastline dissolving into cloud and then nothing — I did not reach for excitement first. I reached for a reckoning. A transatlantic flight is the loudest thing a person can do, ecologically speaking, and I have spent enough time in laboratories to know that loud reactions leave residue. I offset the emissions. Not as erasure — you cannot un-release a molecule — but as acknowledgement. The kind of accounting that says: I know what I am doing, and I am not pretending otherwise.
What follows the crossing is quieter. Stranger, in its own way.
I will move through Boston slowly — on foot, by train, at the pace of someone wanting to inhabit a place rather than pass through it leaving damage. I will carry the same dented flask I carry through St Andrews on mornings when the haar comes in and the town becomes something half-dissolved, half-dreamed. I will not leave mountains of plastic in my wake. I want to move through a place the way water moves through rock — present, but not destructive. Changed by the contact. Not the cause of ruin.
The UN Sustainable Development Goals give this a name: climate action, responsible consumption, sustainable cities. I am grateful for the names. But I learned the feeling earlier, standing at the edge of the North Sea watching the tide deliver things from coordinates I could not find on any map. Someone’s carelessness, carried by current, arriving at my feet like a question I hadn’t asked. Systems do not respect borders. Everything is downstream of everything else. This is chemistry. This is also just being alive on a planet that keeps the score.
My grandmother’s jar of water sat on the sill until she died. When we cleared the house, nobody could agree what to do with it — too strange to keep, too meaningful to pour away. We kept it. Of course we kept it. Some things, once taken from their place, become the reminder that you took them.
I would like to travel to Harvard and come home having only that.
