3.1. Biochar and climate change
The natural carbon cycle includes natural char production from wildfires, the ensuing
transport of char from the soil to watercourses and the ultimate burial in marine or estuarine
sediments. Since routine and universally acceptable methods for black carbon and
specifically charcoal are still outstanding, the precise magnitude of the rates and processes,
and the relative size and stability of char in the soil and sediment pools are still uncertain