Opportunity cost.
justacarguy.blogspot.com: high school guys making farming stuff from used up tires... this is cool
Just burn the sidewalls. Unless you need mechanically stabilized gravel
https://41cef548pyo610dh50468nkk-wpe...Concrete_3.jpg
Frankly, I'd just cut them in half. Half the cuts and they'd go twice as far.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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