Because we cannot protect what we do not understand.
Many schools are working hard to improve indoor air. But most schools still do not know where exposure is highest or lowest inside each classroom.
If we do not know which seats have the highest exposure, we should not leave the same children in the same seats every day.
The reasoning, simply put.
Air behaves
Air is shaped by layout, people, heat, ventilation, windows, doors and devices.
Exposure can vary
A classroom average can hide differences between seats and zones.
Repeated exposure matters
Air pollution risk is not only about one moment. Repeated exposure over time matters.
Seat rotation is simple
It costs nothing. It can begin tomorrow. It is not perfect, but it is fairer than doing nothing.
Swap Seats is not a replacement for ventilation, filtration, monitoring or good indoor air quality standards. It is a practical equity action schools can take while better tools and understanding are developed.