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Rao, a Colorado teenager who has won praise for her innovation in detecting lead levels in water, said, "I really want to put out that message: If I can do it, you can do it, and anyone can do it."
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The climate activist responded like the social media-savvy teenager she is, with a sly change to her Twitter profile.
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She burst onto the world stage after organizing school strikes and protests to call attention to the climate crisis. The Swedish activist, 16, is the youngest person to earn the title.