Ian Field wrote:


:"David Scheidt" wrote in message
:news : Joy Beeson wrote:
: :On Wed, 03 May 2017 07:30:42 +0700, John B Slocomb
: wrote:
:
: : You mean there were no rusty roofs until acid rain was invented?
:
: :Rain has always been acid. That's why southern Indiana is hollow.
:
: Limestone is soluable in distilled water.

:Most people seem to believe the exact opposite - pollution is most widely
:blamed for erosion of decorative limestone architecture.

Please explain how what I wrote implies that pollution does not damage
limestone.


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