What are the benefits of using renewable energy sources, and how do they contribute to a sustainable future? 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*. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed. in your response, the word 'sustainable' should appear at least 2 times.

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