Your response should contain at least 4 sentences. Highlight at least 2 sections in your answer with markdown, i.e. *highlighted section*. Include keywords *environment, sustainability, technology* in the response. The word *sustainability* should appear at least 3 times. In your response, the letter *e* should appear at least 20 times. Your entire response should be in English, and in all lowercase letters. no capital letters are allowed.
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