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On Valentine's Day, communities across the U.K. display green hearts in windows and residents send green hearts to local representatives to encourage environmental action.

\"We've had kind of people from every corner of the U.K. who've been using the symbolism of a green heart to engage with their members of Parliament to put forward the case for action, for climate change, and to protect what we love from its in impacts,\" Meech said. \"And we found that ... each green heart inspires another.\"

ABC News' Ginger Zee contributed to this report.

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