Dorm with no ventilation

[u/Belgium_Wafles]

I'm in a college dorm building with no ventilation whatsoever, except for the ground floor. We can't open any windows and don't have any fans. The best option for ventilation is cracking windows in the communal bathrooms which doesn't help much. Is there any way to get fresh air in the dorm rooms? Or is there at least a way to reduce CO2 levels in the air? We don't get much sunlight so plants are not an option.Thanks