solid carbon fuels — charcoal, coal, and coke

• ▶Why charcoal is the first great cooking fuel
• ▶Charcoal | Primitive Technology
• charcoal vs coal vs coke
• where to buy coal?

Wikipedia:

• charcoal [category]
  • briquette
  • charcoal pile
  • biochar
  • binchō-tan
• coal [category]
  • bituminous coal
  • sub-bituminous coal
  • metallurgical coal
  • black coal equivalent
• coke