Pretty obvious why that ' s a bad idea . <| sep |> I ' m extremely skeptical that this works . Anyone with a background in ventilation theory knows that suctionexhaust type ventilation systems lose ~ 90 % of their suction efficiency at one diameters distance from the suction opening . So basically if that suction is 1 meter across , it ' s only capturing a tiny fraction of air pollution outside of a meter from the opening . And that is betting on perfect conditions with no wind or turbulence . This would work well for inside warehouses or factories , but in the outside air it ' s basically a waste of money or a publicity stunt . <| sep |> It ' s easy to have patience with this . Because you will be disapointed when the Supergirl part ends . You will want more and you ' ll have to wait a whole day . During that day you will have regret that you didn ' t save the episode up to watch it back to back . I ' m going to watch it all on saturday . S u p e r g i r l F l ashArrowLegendsofTomorrow back to back like 1 big tv movie .