What type of air pollution could cause corrosion?
Acid rain caused by SOx and NOx in the air can (and does) cause corrosion of metals and stone (limestone and marble) as ell as concrete.
Hydrogen sulfide can cause corroding of metals like iron and tarnish silver.
Salt spray can corrode iron and steel and erode concrete
Any material which is a powder or fume can deposit on surfaces and cause water and dew to wet the surface for a longer peiod of time - wet metals interact with oxygen and corrode faster.
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