Carbon=embodied energy- wood, coal, manure, petroleum
In rural india, which is very energy scarce still, cow dung is collected and turned into dried packs and used for cooking, In china, the traditional chamber pots collection system collected night soil to use for manure in farming. These were traditional examples of virtually closed carbon cycles!
Its energy surplus environments that release excessive carbon and where theres a movement to return to grassroot systems.
Thanks for a lovely talk, good reminder of how recently carbon had a positive spin, which helps us understand why we are now in the position we are.