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With today's pollution this is no longer healthy. Fruits will absorb pollutants and the acid rains will stick to their skin slowly penetrate as well. That's why we have currently trees that are very resilient against cities harsh conditions, like Linden Birch Beech and Poplar (Populus).

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Where is this coming from? There are certainly things you can do to grow fruit in the city or at least reduce the effect pollutants have. I've seen so many figs that thrive in cities.

i.e. https://academic.oup.com/bioscience/article/67/9/868/4080176

Check out permaculture, it's entirely possible.

Your health, please consume fruits from trees in polluted cities. I prefer not to.

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