The UN's latest cryosphere reports are concerning for any reader, but especially those of us who worry about Pakistan's water, food and security.

Two UN-backed reports warn that overshooting 1.5°C of warming will bring "large-scale and in many cases irreversible impacts" for glaciers, sea ice, permafrost and polar oceans. Warming has already reached 1.37°C, and the 1.5°C threshold could be crossed around 2030. Scientists now believe a truly safe temperature for the Earth's ice is closer to 1°C -........

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