Graz had a tropical night. The lowest temperature recorded was 21.5 degrees Celsius – the lowest summer temperature in 128 years. The current records fit very well into the pattern of climate change – our topic –  this month about hot cities, particularly about the hot city of Graz. Mirza, Nicolas and Gea researched the field, Hannah interviewed Florian Ungerböck from Auto-frei-tag, Benedikt edited it. We unwrap our thoughts about the hot city and then we serve you some researched facts about the innovative urban photo-bioreactor, community gardening and other challenges of re-greening the city of Graz.

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