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Saeed Khan/AFP/Getty Images, @TootingCommon/Twitter

Despite the planet being in peril, the term "tree hugger" still tends to be used derisively. But that hasn't stopped residents of Melbourne, Australia from showing the city's trees some love—and they're expressing it appropriately: paperless.

In 2013, city officials designated each tree with a unique number and corresponding email. Initially, the effort was intended to let citizens more efficiently notify officials of needed repairs and maintenance.

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