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[RetiredSubmariner]

The process described by the OP sounds very wasteful.

Cutting down a green living tree to make charcoal briquettes consumes a lot of energy.

We heat our house burning firewood. We live in dense forest, our firewood comes from old dead trees [either standing dead wood or trees that have fallen down during a windstorm].

Dead dry wood burns much easier than green wood

We even have a wood burning cookstove [it is brand new, my wife wanted one].