Climate crisis and European cities: from shallow to deep adaptation
Climate crisis and European cities: from shallow to deep adaptation

Summary/Abstract: Four years after the Paris Agreement, atmospheric carbon dioxide (CO2) concentration continues to rise at the same speed as it did before, reflecting unabated growth in global CO2 emissions. In the meantime, CO2 concentration reached 415 parts per million (ppm),a level not found on Earth for15 million years, since the Miocene era, when the average global temperature was at least 4 degrees Celsius higher and sea levels were at least 25 meters higher than today. Further rises in global temperature are unavoidable. The speed and maximum reached will, however, depend on how successful humankind is in achieving carbon neutrality within the coming years and decades. Many cities and towns, especially in subtropical and tropical climate zones, are already being confronted with the devastating effects of climate instability manifested in more frequent, widespread or intense droughts, wildfires, floods, heatwaves, storms and other phenomena, which lead to crop failure, water scarcity, economic devastation and socio-political and security instability. Cities and towns in Europe and other moderate climate regions will soon be confronted with similar situations, and these will make it difficult to fulfil the needs at the base of the Maslow pyramid of human needs. Now is the time for deep climate adaptation and resilience building, while European societies are still rich and stable. The failure to understand the causes and consequences of the climate crisis brings with it the risk of widespread disasters, including the potential collapse of urban centers.

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