Evidence comes not only from pollen-spore data but also from wood charcoal in former hearths at archaeological sites.

Soil amendment to ferralsol with wood charcoal greatly increases productivity.

Wood charcoal, tar, wood vinegar and other chemicals were manufactured.

These are all grilled over wood charcoal.

The sealed design of the grill results in a slow burn that uses small amounts of charcoal compared to a regular grill, and lump wood charcoal also creates little ash.