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Fearlessleader85 t1_j6tl1h1 wrote

Reply to comment by RagnarokDel in Planting more trees could axe summer deaths by a third. Modelling of 93 European cities finds that increasing tree cover up to 30% can help lower the temperature of urban environments by an average of 0.4°C and prevent one in three heat deaths as a result. by MistWeaver80

The problem with green roofs is cost and potential failure. It's actually very difficult to seal them, and when a leak does show up, it's difficult to fix. Trees tend to also be absolutely excellent at breaking through even concrete, so planting trees on roofs is asking for a problem.

Green medians can be a much more cost effective way to green up a city. Small rooftop gardens with potted plants or shallow beds with shallow rooted plants could help.

I would love to see 80' tall sycamores and maples on top of skyscrapers, but i don't think it's practical.

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RagnarokDel t1_j6ue03a wrote

> Green medians can be a much more cost effective way to green up a city.

ah yes, patches of grass. the worst possible greening you can do.

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Fearlessleader85 t1_j6ukka9 wrote

That's not what I'm referring to. Trees and brush in the median. Think Tuscon AZ, not Beverly Hills.

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