Global greenhouse gas (GHG) emissions continued to rise to 2019: the aggregate reductions implied by current Nationally Determined Contributions (NDCs) to 2030 would still make it impossible to limit warming to 1.5°C with no or limited overshoot, and would only be compatible with likely limiting warming below 2°C if followed by much steeper decline, hence limiting warming to either level implies accelerated mitigation actions at all scales (robust evidence, high agreement).
Introduction and framing
Bosetti, Valentina;
2022
Abstract
Global greenhouse gas (GHG) emissions continued to rise to 2019: the aggregate reductions implied by current Nationally Determined Contributions (NDCs) to 2030 would still make it impossible to limit warming to 1.5°C with no or limited overshoot, and would only be compatible with likely limiting warming below 2°C if followed by much steeper decline, hence limiting warming to either level implies accelerated mitigation actions at all scales (robust evidence, high agreement).
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