You leave the fans off to save power, and to “keep the CO2 at the leaves.”

Still air does keep CO2 near the ceiling and in the room average. Leaves live in a coat. The coat goes stale. Stomata wait for a walk that does not arrive.

Oskar points at a strip of ribbon tied to a stake. The ribbon hangs like a guilty noodle. “That’s our weather. Weather is a job.”

Imani: “Power saved, photons wasted, gas wasted. You can still switch the fans. You can insist because quiet feels gentle, and gentle feels like grower.”

Gentle is not a boundary layer.

GROVE: “Leaf-surface CO2 below room average. Classic still-air deficit.”

Classic is a rude word when it is about you.