I think Cowboy band is a "natural" wood charcoal, readily available.
Also, biochar and earthworms are not mutually exclusive, they can be used in
combo.
If the biochar is used for farming instead of grilling, that is a better use
for the product. Grilling produces CO2, biochar depletes it. Especially as your
plants are bigger, consuming more of CO2. Also, biochar keeps the nutrients in
the soil, so there is less leakage to waterways. So you need less fertilizer,
which could well be worm castings. Rivers stay cleaner as fertilizer is not
flushed away. Your compost tea will last longer. You can share your excess with
a neighbor.
In arid conditions, biochar allows farmers to use less water to produce more
crops.
Biochar has been successfully made from waste products that would otherwise go
to an incinerator or landfill. Making carbon based waste into biochar has HUGE
potential for a cleaner, more sustainable earth.
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