Carbon sequestration
If the chimney is to be redirected into the ground, any remaining smoke can be absorbed by the ground. If trees, vegetation is planted atop of the soil, all co² can be absorbed by trees. This would nullify emissions.
Another thought is hot water, via a heat exchanger water can be heated, which (in certain cases) may eliminate the need of a boiler for hot water. See the planet mechanics-episode "Heavy Metal House".
Hope these alterations may be added to the stove's design, as they allow increased efficiency and ecological gain.
81.244.206.161 05:37, 18 September 2008 (PDT)