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  • It looks like Avatar, I'm not a fan. I would have thought it would be bad for the trees (do trees need to breath? I don't know how trees work).

    Trees need to breathe. That's why london has so many plane trees. They regularly shed bark which stops their pores becoming completely clogged by pollution, so they survived the smog.

    It sounds like they've thought of that though:
    http://www.cityoflondon.gov.uk/things-to-do/green-spaces/city-gardens/news/Pages/default.aspx

    The plane trees will probably be back to normal in a few years. They don't say whether the others will remain blue forever, or will slowly fade, or have their colour topped up.

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