Description: 50x30: Addressing climate change and staying close to 1.5°C means reducing emissions 50% by the year 2030; overshoot of this limit leads to dangerous feedbacks from the Earth's cryosphere, many irreversible on human timescales.
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We see far greater risk of massive irreversible sea level rise (SLR) at 2°C, on a scale of 12–20 meters or more in the long term. The climate record of the Earth over the pat few million years is quite clear:
Cryosphere Impacts of Overshoot
What 50x30 Pathways Look Like