20–40-year sliding windows, reflecting a generational offset that generational amnesia is sufficient to explain the offsets in perception of environmental change. We argue that historical archives carry a generational imprint of perceptual bias, in which the severity of climate extremes is judged against recent lived experience rather than long-term climate variability https://www.nature.com/articles/s41467-026-78922-x #ClimateChange #UpheavalClimate #ClimateInstability #ClimateReversal #pollution #environment #climate