What are the key benefits of using renewable energy sources, and how do they contribute to environmental sustainability? Your response should contain at least 2 placeholders represented by square brackets, such as [address]. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. *** There should be 2 paragraphs. Paragraphs are separated with the markdown divider: *** *** At the end of your response, please explicitly add a postscript starting with *P.S.*.
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