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from ambient air. The process generally follows a three-stage cycle: : Large fans pull ambient air into a contactor.

: The medium is heated (often to high temperatures) or placed under a vacuum to release the concentrated CO2cap C cap O sub 2 , after which the medium is reused. Primary Technical Approaches from ambient air

: A chemical medium—either a liquid solvent or a solid sorbent —binds with the CO2cap C cap O sub 2 molecules. from ambient air