Climate Catastrophe

Based on accelerating global trends, the most likely world-ending scenario is a climate catastrophe driven by unchecked greenhouse gas emissions, deforestation, and biodiversity loss. Rising temperatures are already causing extreme weather events, sea-level rise, and food shortages, with projections indicating tipping points like melting permafrost and collapsing ice sheets by mid-century.

Geopolitically, resource wars over water and arable land could escalate, while societal breakdowns from mass migrations and economic collapse amplify the chaos. Technological efforts like carbon capture may mitigate but not reverse the damage in time, leading to widespread societal collapse, famines, and eventual human extinction through uninhabitable conditions rather than a sudden event.