सौर ऊर्जा, टिकाऊ ऊर्जा, ऊर्जा संक्रमण, वातावरण, प्राकृतिक ऊर्जा, रवि, गर्मी, चित्रण, वेक्टर, प्रतीक, सूरज की रोशनी
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