Bronze sculptures in high-pollution urban centers face unique challenges due to environmental factors. One of the most prevalent issues is accelerated corrosion caused by acidic pollutants like sulfur dioxide and nitrogen oxides, which react with the metal to form unsightly patinas or even weaken structural integrity. Discoloration is another common problem, with pollutants causing uneven green or black tarnishing that obscures artistic details.

Particulate matter from vehicle emissions and industrial activity can also embed into the bronze surface, creating a gritty layer that traps moisture and accelerates deterioration. Additionally, urban heat islands and fluctuating temperatures in polluted areas may cause thermal stress, leading to micro-cracks over time.

To mitigate these issues, regular cleaning with pH-neutral solutions and protective wax coatings are essential. Some cities employ advanced anti-corrosion treatments or relocate vulnerable sculptures to indoor displays. Understanding these challenges helps conservators and urban planners preserve these cultural treasures for future generations.