National Geographic : 2010 Aug
ART: SPLASHLIGHT. SOURCE: KLAUS LACKNER, LENFEST CENTER FOR SUSTAINABLE ENERGY, COLUMBIA UNIVERSITY HOW IT WORKS 2 As filters become saturated, they are lowered into vacuum chambers and rinsed with water vapor, which removes the lightly bound CO from the filters. 3 The filters return to the carousel. The CO is separated from the water, compressed to a liquid, and pumped underground (see following page). 1 2 3 1 Wind blows air through a carousel's plastic filters, which are laced with an absorbing agent that extracts CO . When the air reemerges, it contains less CO .