Mechanical trees able to capture carbon dioxide could reduce pollution while also collecting the gas for reuse.
Developed by a team from Arizona State University, the ‘mechanical trees’ consist of a column made up of stacked discs of sorbent, which will capture CO2 when exposed to air. The full discs are then lowered into a container, where the CO2 is collected for use and the now-empty discs redeployed.
Twelve trees could remove one metric ton of CO2 each day for less than $100 a ton, which is the lowest in the industry—a key advantage to the technology and its potential impact.
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