facts and ideas

energy content from wood

idea:  Use pop bottles in place of grow beds in a self watering system

idea:  collect egg shells and use it to make carbon dioxide scrubbers for chimneys in wood burning stoves

idea:  use copper windings through which water passes in order to obtain heat from burning wood

idea:  use "death ray" from a fresnel lens to heat up calcium carbonate so that it releases carbon dioxide

idea: use carbon dioxide as a fumigant to kill insects on plants

Update:

In case this needs explaining, egg shells are made of calcium carbonate, and so are bones.  Heating them up sufficiently causes them to release carbon dioxide.  The carbon dioxide is what I seek to use as a useful product in its own right.  As for the ashes, they can be reconstituted into calcium carbonate.  Just add water and it becomes an carbon dioxide scrubber because it will soak it up and remake the calcium carbonate.

That's a cycle that can be exploited.