590136 Disclosed is an apparatus (1) for reducing the carbon dioxide contained in combustion smokes. The apparatus comprises at least one smoke inlet conduit (2) inside at least one operating chamber (3) and at least one ejection conduit (4) for the gases treated. The at least one chamber (3) comprises at least one plant (10) arranged along the smoke path between the inlet conduit (2) and the ejection conduit (4). The smokes strike the plant (10) surfaces during their circulation.