Forest fuel biochar burial
The effects of biochar burial in California would be so minuscule they might be a net negative once you include the CO2 production of the labor involved. Biochar is a very labor intensive process. Consider carbon in fossil fuels was accumulated of millions of years of what is essentially the same process, even industrializing the process will still take comparable amounts of time to resequester that carbon using what is basically the same method. keep in mind fire is a normal part of many of these environmental cycles they are bad because humans kept preventing the normal fire cycles allowing fuels to build up for decades. Normally that fuel would be cleared by the natural fire cycles. Drought is a trigger not the cause.
Large impact estimates assume we would have to be converting land to biochar production, which has many many downsides and still would not be very effective.
It can be particularly confusing since &quot;Bio-char&quot; can mean two different things, the most touted use of biochar (fertilizer) will have no real carbon sequestration effect but can be a way to offset industrial fertilizers. Burial would sequester some carbon, but would also deplete soils and biodiversity. You have to check and see which use of biochar a source is referring to.
A better idea would be to burn the material as fuel, instead of fossil fuels, which would at least be carbon neutral.
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