Villagers in the Mexican state of Veracruz discovered the tablet sometime before 1999, while quarrying an ancient Olmec mound for road-building material.
Around half the carbon dioxide emissions from cement making come from the calcination reaction alone, the rest coming mainly from quarrying the limestone and heating the kiln.
To essentially do a kind of quarrying, a search into the space of the things it's learned to customize that to whatever problem you're trying to solve.
This is Cox's Cave the oldest of the two show caves, accidentally discovered in 1837 by George Cox a local mill owner who was quarrying Limestone for a new building.
In the mid 17th century the family put Craster on the map by quarrying the stone at an industrial level, exporting windstone via the harbour far and wide and even paving the streets of London.