He ' s not coming back . <| sep |> Dota 2 Dem couriers man <| sep |> Cool concept and cool organism . Might be a good crop for permaculture or aquaculture since it has N 2 fixing symbiosis . In one study Azolla captured 32 . 54 metric tonnes CO 2 hectareyear . Doing a little thought experiment how much CO 2 could be captured by Azolla on lake Superior per year ? 32 . 54 e 3 kg CO 2 hectareyear 8 . 21 e 6 hectares 2 . 67 e 11 kgyear . For total clearning of 3 e 15 kg excess CO 2 in about 11000 years . But if it were performed on the other great lakes too 2 . 45 e 7 hectares it would take 3700 years to scrub excess CO 2 . The cold temperatures there would cause massive Azolla die offs . All the Azolla would have to be sequestered the lake would have to be rendered anoxic so fallen Azolla wouldn ' t decompose , and Azolla would need to be reseeded after each winter . I ' m not advocating that the great lakes ecosystems should be the sacrificial lamb for the entire world ' s carbon sins . just trying to put some numbers to it . 1 . usesasaco 2 sequester 2 .