Effects of Air Pollution on Materials and Cultural Heritage: ICP Materials Celebrates 25 Years of Research

<table>Average SO<sub>2</sub>, NO<sub>2</sub> and O<sub>3</sub> trends relative to the year 1987 at ICP Materials test sites.</table>

International Journal of Corrosion

Figure 2: Effects of Air Pollution on Materials and Cultural Heritage: ICP Materials Celebrates 25 Years of Research 