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2. Concrete and mortar made of limestone can react to the carbon dioxide in rainwater and wear away The resulting damage takes the form of gaps between bricks and buildings, which must be repaired by filling in the gaps Burning fossil fuels can increase the rain's acidity, which further damages limestone Acidbased cleaning chemicals can also be harmful
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7.Fly Ash for Cement Concrete NTPC Limited Off take by cement manufacturers Cement Made Of Coalcement Made Of Coal Limestone for production of fly ashpresent, about 60% power is produced by using coal as fuel, which results in the production ofmaterials such as limestone, coal etc required for manufacture of and cement