[quote=Ink-berry]
It won't be too much control, just with areas that have a high concentration of dust, and only if the parts are small enough. Like, fine / possibly dust that's almost powder-y. (He won't be able to control small pieces of rock, though.) I'm guessing his powers work best indoors, where dust gathers more easily. If the dust's made of the right material, then he could probably stir up a miniature sand / dust storm, mostly as a defense. For offense, I guess he could... make the dust get into his opponents' eyes...? I guess he'd be able to absorb some of it, as well, although that wouldn't be great for his health and probably make him all coughy for a while.
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If he can move dust at the speed to create a sandstorm, he can force it down someones throat and into their lungs.