| Caption: Cement works with smoking chimneys. Photographed in Alberta, Canada. |
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| Facts: Cement is the key ingredient in concrete - the world's most widely used construction material. Cement is commonly made by heating limestone, clay and sand in a kiln at about 1500 degrees Celsius. Gypsum and a few other ingredients are then ground into this product.
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| Photographer: David Nunuk |
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| File Info: |
| MEDIUM RES: JPG, 3677x2526, 1.9Mb, ARGB |
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| Keywords:
cement, cement works, cement plant, cement plants, concrete, chimney, chimneys, smoking chimney, smoking chimneys, pollution, pollutants, environmental, environment, air pollution |
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