Dear Ron
"Why would anyone want to use charcoal now when it costs 3 times as much per GJ" That is a question worth asking. The peri-urban users of charcoal might ask similar questions about why we buy smart phones when talking face to face is free. People spend their money, usually all of it, for reasons that are deeply cultural. Of all behaviours, changing something related to cooking is the most difficult. Regards Crispin
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