The jokes almost write themselves for this one.
https://www.engadget.com/scientists-strengthen-concrete-by-30-percent-with-used-coffee-grounds-221643441.html?guccounter=1&guce_referrer=aHR0cHM6Ly9tLnNsYXNoZG90Lm9yZy8&guce_referrer_sig=AQAAACsGpxUX9W2MIVZxUN2Unsiv4TnRrDmZRMY_at125lP2laHL862JxXW-CuroxVTUblcWiBHX4NtSBjRB-iospjDYohd9ofwlHEQI6cRiYIaQjPdTScXVftxPjPs2B1lWqKRfiPGpOJXFEdJ3ZP8WZb1Zhr2Kjh6nw6dcMZhCDdTV
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