thumb i would be about a gram of topsoil you would have anywhere from ten thousand to a billion bacterial cells. dust is clearly a major house and so there's an urgent need to understand the behavior of dust storms to help people cope with their impact. or three to. start with. one of the best ways to study dust storms is by satellites orbiting the. people didn't understand the intensity and how far these storms could move until we have satellite imagery. nasa has over twenty earth