I hope those plants are well secured, you don't want your Zero G hydroponics system suddenly becoming a aeroponics system.
It's a classic O'Neill cylinder. (Relies on windows instead of LED-based light.) Anything touching the "floor" has artificial gravity generated via centrifugal force as the cylinder rotates. No idea why the girl is floating, though, in a small cylinder like that, it would need to spin quite fast, so she'd be hovering just above a tumble dryer speed. That said, in space colonization plans, plants get by just fine with microgravity and can be put into smaller secondary cylinders, so maybe it's just barely enough speed to keep the soil in place?
