So what I'm showing you here is what a system might look like to do just this.
This is called an air contactor.
You can see it has to be really, really wide in order to have a high enough surface area to process all of the air required,
because remember, we're trying to capture just 400 molecules out of a million.
Using the liquid-based approach to do this, you take this high surface area packing material,
you fill the contactor with the packing material, you use pumps to distribute liquid across the packing material,
and you can use fans, as you can see in the front, to bubble the air through the liquid.
The CO2 in the air is separated the liquid by reacting with the really strong-binding CO2 molecules in solution.
And in order to capture a lot of CO2, you have to make this contactor deeper.
But there's an optimization, because the deeper you make that contactor,
the more energy you're spending on bubbling all that air through.
So air contactors for direct air capture have this unique characteristic design,
where they have this huge surface area, but a relatively thin thickness.