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SCIENCE

The Claim

Limiting global warming to 1.5°C above pre-industrial levels requires global net zero CO₂ emissions by around 2050.

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The Short Version

This matches the IPCC’s central benchmark for 1.5°C-consistent pathways. In pathways that limit warming to 1.5°C with no or limited overshoot, global net CO2 reaches zero around 2050 or the early 2050s. The main caveat is that this is a typical pathway result rather than an exact rule for every modeled scenario, and it must be accompanied by steep cuts in non-CO2 emissions.

Caveats

  • The ~2050 benchmark most directly applies to pathways with no or limited overshoot of 1.5°C; some higher-overshoot scenarios reach net zero later.
  • Net zero CO2 by around 2050 is necessary in standard IPCC 1.5°C pathways, but not sufficient on its own; major methane and other non-CO2 reductions are also required.
  • 'Around 2050' is a central estimate from assessed pathways, not a single exact date or a universal endpoint for every modelled 1.5°C scenario.

The Receipts

  1. Summary for Policymakers — Global Warming of 1.5 ºC

    IPCC

  2. Chapter 2 — Global Warming of 1.5 ºC

    IPCC

  3. Global Warming of 1.5°C – Headline Statements

    IPCC

  4. Technical Summary

    IPCC

  5. Chapter 3: Mitigation Pathways Compatible with Long-term Goals

    IPCC

  6. Global Warming of 1.5 ºC

    IPCC

  7. SR15 Chapter 2 – Mitigation Pathways Compatible with 1.5°C in the Context of Sustainable Development

    IPCC

  8. AR6 Synthesis Report: Summary for Policymakers

    IPCC via UNFCCC

  9. Net Zero Roadmap: A Global Pathway to Keep the 1.5 °C Goal in Reach (2023 Update)

    International Energy Agency

  10. AR6 Working Group I – Summary for Policymakers

    IPCC

+ 17 more sources — see the full list on Lenz

Filed Under

IPCC

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