Digital infrastructure became so advanced that massive urban migration halted. People moved back to sustainable, tech-integrated, localized communities, often called "Bio-Nodes." The "X" Variable: Post-Humanism and AI Synergy

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That optimistic scenario—emissions stabilized to reach 538 ppm of atmospheric CO₂ by 2100—was not achieved. The world took a middle path, and by 2069, global temperatures have surpassed the 2.5°C threshold above pre-industrial levels. Catastrophic flooding now routinely affects major coastal cities like New York, London, and Tokyo, with sea levels having risen dramatically over the past half-century.