Earth may experience a radically different climate already within 34 years, forever changing life as we know it, said a study Wednesday that aims to bring the dangers of global warming into sharper focus.
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On current trends of greenhouse-gas emissions, 2047 will mark the year at which the climate at most places on Earth will shift beyond documented extremes, it said.
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This date is pushed back to 2069 under a scenario in which fossil-fuel burning emissions are stabilised, said an analysis of climate projections published in the journal Nature.
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"The results shocked us," lead author Camilo Mora of the University of Hawaii's geography department said of the findings.
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"Within my generation, whatever climate we are used to will be a thing of the past."