Klaus Lackner/ COLUMBIA UNIVERSITY
One of Lackner's designs for an "artificial tree," the carbon scrubber he developed to absorb CO2 from the air. Each scrubber captures one ton of CO2, the amount emitted by 75 cars burning about 1.3 gallons of gasoline.
Klaus Lackner/COLUMBIA UNIVERSITY
Thinner plastic filters than this older model are housed inside of the main carousel of a scrubber. When wind blows through the scrubber's plastic filters, they absorb CO2 unitl saturated, at which point they are lowered into vacuum chambers to be cleaned before resurfacing.
Columbia University geophysicist Klaus Lackner is developing carbon capture technology, demonstrating viability with a prototype unit. He spoke at this month's Comer Abrupt Climate Change Conference.