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https://umweltpsychologie.net/2018/07/01/warum-finden-wir-es-stressig-wenn-zu-viele-menschen-um-uns-herum-sind-2/
Warum finden wir es stressig, wenn zu viele Menschen um uns herum sind? - Die urbane Dichte. (or: why do we perceive an environment stressful, if too many people are around us? - Crowding)