Which of the following affects the surfaces of historical buildings made out of sandstone or limestone, and causes a reaction that forms a powdery substance that can be washed away by rain? coal dustsulfur

Which of the following affects the surfaces of historical buildings made out of sandstone or limestone, and causes a reaction that forms a powdery substance that can be washed away by rain?

coal dustsulfur pollutantsvolcanic ash none of these were mentioned in the reading

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Which of the following affects the surfaces of historical buildings made out of sandstone or limestone, and causes a reaction that forms a powdery substance that can be washed a…

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