Bronze sculptures exposed to pollutants face significant risks, including corrosion, discoloration, and structural damage. To preserve these artworks, several effective conservation techniques can be employed.

1. Regular Cleaning: Gentle cleaning with soft brushes and pH-neutral solutions removes surface pollutants without damaging the patina. Avoid abrasive materials that can scratch the bronze.

2. Protective Coatings: Applying microcrystalline wax or lacquer forms a barrier against moisture and airborne pollutants. Reapplication every few years ensures ongoing protection.

3. Environmental Controls: Displaying sculptures in controlled environments with stable humidity (40-50%) and low sulfur dioxide levels minimizes chemical reactions.

4. Corrosion Inhibitors: Using benzotriazole (BTA) or other inhibitors slows oxidation and prevents green patina from becoming destructive.

5. Encapsulation: For highly sensitive sculptures, acrylic or glass enclosures with inert gas can isolate them from pollutants entirely.

By combining these methods, conservators can significantly extend the lifespan of bronze sculptures exposed to urban or industrial pollutants. Regular monitoring and maintenance remain critical to adapting strategies as environmental conditions change.