Well, I think they'll move the whole thing to a nearby coal or gas power station and fit over the chimney stack. After all, that's where the CO2 is concentrated. It wouldn't make sense suck CO2 out of the atomosphere as a trace molecule at 430 PPM - that would be stupid. Hopefully they plan to miniaturize the technology and fit it over transportation exhausts and wherever else we're dumping out CO2 in high concentrations.