Future of the Human Climate Niche

Global

The paper presents a data-backed analysis of climate change-induced extreme mean annual temperature (MAT) changes impacting almost 3.5 billion people, predominantly in the global South. The limited temperature range within which humans and food production has thrived for the last 6,000 years is ∼11°C to 15°C. The global temperature has increased by 1°C. For each additional degree, one billion people may find themselves living in uninhabitable areas. This “human niche”, as the authors call it, will be limited to only a narrow zone in the northern hemisphere by the end of this century unless we radically adapt. This will have serious implications for global migration and for national political and security issues. Immediate action at unprecedented scales needs to be mobilised to mitigate climate change and to create targeted policies for rapid climate adaptation in the affected areas.

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