DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Limestone quarry. Limestone (calcium carbonate) is used as a building material in the construction industry, and as an raw material in the production of cement. It is also a raw material for the production of slaked lime (calcium hydroxide), an alkaline material used in farming to neutralise acidic soils. Photographed in Maizeret, Belgium.
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