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Correlation ⇏ causation. Possible confounding factor: green cities are the result of environmentally-friendly policies which also happen to reduce city polluti
by noname120 7y ago
Correlation ⇏ causation.
Possible confounding factor: green cities are the result of environmentally-friendly policies which also happen to reduce city pollution.
- carapace 7y agoYeah, I'm an eco-nut but my first (well, second) reaction was, "Is it that proximity to trees is roughly inverse to proximity to cars and other pollution sources?" I was just reading about nanoparticle pollution: https://www.bbc.com/future/article/20191113-the-toxic-killers-in-our-air-too-small-to-see https://www.bbc.com/future/article/20191113-the-toxic-killer... Evidently it's both really bad and pretty localized (exposure levels seem to drop rapidly with distance from car traffic, for example.)