आरक्षित प्रकृति, वातावरण, पर्यावरण संरक्षण, परिस्थितिकी, पृष्ठभूमि, स्थिरता, पारिस्थितिकी तंत्र, प्राकृतिक संरक्षण, भविष्य, प्रकृति, ऊर्जा
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