What are the effects of prolonged exposure to industrial emissions on granite outdoor tree boxes?

Prolonged exposure to industrial emissions can significantly impact granite outdoor tree boxes, leading to visible and structural damage. Over time, acidic pollutants like sulfur dioxide and nitrogen oxides react with the stone's minerals, causing surface erosion, discoloration, and weakening of the granite. This degradation not only diminishes aesthetic appeal but also compromises durability, making the tree boxes more susceptible to cracks and breakage. Additionally, particulate matter from emissions can accumulate, accelerating wear. Regular maintenance and protective coatings may help mitigate these effects, but long-term exposure remains a concern for urban landscaping projects using granite. Understanding these impacts is crucial for sustainable material selection in polluted environments.