Are marble outdoor garbage bins prone to discoloration from air pollution?

Marble outdoor garbage bins are valued for their elegant and durable appearance in public spaces. However, a common concern is their susceptibility to discoloration, particularly from air pollution. The primary cause of discoloration is the reaction between acidic pollutants—such as sulfur dioxide and nitrogen oxides—and the calcium carbonate in marble. This can lead to etching, dulling, or yellowish stains over time. While marble is relatively weather-resistant, prolonged exposure in heavily polluted urban areas accelerates this process. Regular cleaning with pH-neutral cleaners and the application of protective sealants can significantly reduce discoloration risks. For high-pollution zones, considering alternative materials or specially treated marble may be advisable. Ultimately, with proper maintenance, marble bins can retain their aesthetic appeal despite environmental challenges.