फ़ैक्टरी, बिजली संयंत्र, उद्योग, ईंधन और बिजली उत्पादन, प्रदूषण, वातावरण, प्रौद्योगिकी, चिमनी, जीवाश्म ईंधन, रिफाइनरी, निर्माण उद्योग
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