Dry birch bark is also an awesome firestarter. I would caution against breathing smoke in general - even "herbal" etc - no matter what the source, it'll contain all sorts of volatile organics, tars and carcinogens simply by virtue of the combustion process. This is what
carbon *does*. Better going for a nice clean complete burn in a
RMH or TLUD and venting it to the Great Outside. Still, those are cool wee kindling bundles
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