Environment & Ecology · Environmental Science
संगमरमर के स्मारकों के क्षरण और पीले पड़ने के लिए मुख्य रूप से कौन सा गैसीय प्रदूषक उत्तरदायी है?
- 1O3
- 2SO2✓
- 3CO
- 4NO2
सही उत्तर देखें
SO2
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