Yeah . Brownian motion . Air currents caused by geothermal convection , etc etc . My point is saying total volume is not enough information to come to a valid conclusion . Oh and look at this quote from a better link down belowCFEJ concluded that the tower ' s effect on PM 2 . 5 was unstable and the effective range was very much limited to its immediate surroundings . Some experts told state media outlet China News that the weight of the machine ' s captured particulate matter per hour is less than that of a spoonful of salt . Turns out it really only did clean the air in the immediate area . <| sep |> I ' ve been out of the meme game so long I enjoy Facebook memes . I don ' t repost them , mind you , but I may comment to let other people know once in a while .