easy · GMAT Verbal Reasoning
Replacing some of cement's limestone clinker with fly ash lowers the emissions of each ton of cement. But fly ash is a byproduct of burning coal, and the coal plants that supply it are being shut down across the region.
Which of the following is most strongly supported by these statements?
- Cement made with fly ash produces no emissions at all.
- The supply of fly ash available in the region is likely to decline.
- Fly ash is a more effective binder than limestone clinker is.
- Shutting down the region's coal plants will increase total cement emissions.
- Limestone clinker will soon be banned outright from all cement production.
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