Membrane-based carbon capture is a technology that utilizes semi-permeable membranes to separate carbon dioxide from other gases. The technique is used to reduce the amount of carbon dioxide in the atmosphere by trapping it before it can be released into the environment. The process works by passing a mixture of air and carbon dioxide through a membrane that is permeable to carbon dioxide but impermeable to the other gases. The carbon dioxide is then collected on the other side of the membrane, reducing its concentration in the atmosphere.