Canadia to the rescue:

In demonstrating the technology in practice, Keith and his team used a custom-built tower to capture CO2 directly from the air while requiring less than 100 kilowatt-hours of electricity per tonne of carbon dioxide. The tower unit was able to capture the equivalent of approximately 20 tonnes per year of CO2 on a single square metre of scrubbing material -- which amounts to the average level of emissions produced by one person each year in North America.

While still in its early stages, the atmosphere-scrubbing technology has already been touted by environmentalists as an energy-efficient and cost-effective way to complement other approaches designed to help reduce transportation emissions, such as biofuels and electric engines.

Now, this should be pursued in addition to planting a lot of trees, but the truth is that over the past 300 years, we've dug massive amounts of shit out of the ground and set it on fire. Getting back into balance means taking a bunch of that shit out of the air and putting it somewhere else again. Trees don't cut it because when you cut them down they rot and the gas gets out again.

Basically the idea is you perfect this kind of rig along with some solar/wind power to keep it running -- just like highway lights on the remote parts of the highway -- and it becomes somebody's high-paying Union Job to service the thing, put the used-up scrubbers in a box car to be hauled off for burial, etc.

Maybe we can re-build the ruined mountain-tops of Appalachia.