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<span lang="EN">Beginning with sand, a liquid mixture of bacteria,
nitrogen, food for the bacteria, a calcium source, and water are
added. Over 5 days, the liquid is gradually added until the food
and water run out and the sand dries. At that point, it is a
concrete brick, with strength comparable to anything that has come
before.</span><br>
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<p class="MsoNormal"><a moz-do-not-send="true"
href="https://www.minds.com/blog/view/418891791245250560/award-winning-low-footprint-bricks-grown-with-sand-and-bacteria-it039s-a-big-deal">https://www.minds.com/blog/view/418891791245250560/award-winning-low-footprint-bricks-grown-with-sand-and-bacteria-it039s-a-big-deal</a><o></o></p>
<p class="MsoNormal"><o><b>Bob Waldrop, Okie City<br>
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