The risk estimate was performed using Lipfert’s damage function, only applicable to carbonate stones of medium and low porosity. This paper reports for the first time the spatial distribution of the potential risk of deterioration on calcareous rocks in terms of surface recession with regard to Mexican cultural heritage in the MCMA for the base year 2007. Some are built with calcareous rocks (limestone and marble) but many of them are made with andesite, tezontle and tuff stone. In the Mexico City Metropolitan Area (MCMA), there are 19 968 buildings registered as archaeological, historic, or artistic monuments. Air pollution is a threat to cultural heritage because it accelerates the natural deterioration of monuments, palaces, churches, and archaeological ruins, which have an irreplaceable value.
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