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The main environmental argument for blended cements is that they

  • A.eliminate all the electricity used in grinding
  • B.allow the kiln to be shut down entirely for good
  • C.reduce the clinker needed and so the emissions
  • D.remove the need for a limestone quarry altogether

Answer: C

Since most of the emission is associated with clinker, replacing part of it with a material that is already a by-product cuts the total proportionately. It remains the most widely applied measure available to the industry.

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