According to the IPCC Working Group 3 report, the stated emissions reductions from signatory countries are not enough to limit warming to 1.5ºC.

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The statement presented is about whether the emissions reductions pledged by signatory countries under the IPCC Working Group 3 (WG3) assessments are sufficient to limit warming to 1.5°C.

First, consider what WG3 analyzes: it focuses on how human emissions, policies, and technologies relate to future climate warming, and it compares current pledges and policies to the pathways required to stay near 1.5°C.

Next, evaluate the assertion that the stated reductions are not enough. WG3 reviews consistently show that the aggregate impact of current commitments (pledges under national policies, projected implementation) falls short of the reductions needed for a 1.5°C pathway. In other words, even with existing plans, warming would likely exceed 1.5°C, unless additional stronger measures are adopted.

Why this is not enough: the 1.5°C scenario requires rapid, deep cuts in CO2 emissions, substantial reductions in other greenhouse gases, and near-term peaking of emissions followed by steep declines. If current pledges are only marginally stronger than earlier efforts, they do not reach the magnitude or pace of change that a 1.5°C pathway demands.

Potential misconceptions to watch for: some might think that “any” reductions automatically align with 1.5°C goals, which ignores the scale and timing required. Others might assume that technological breakthroughs or future policies will magically close the gap; WG3 emphasizes near-term action is crucial, not just hoping for breakthroughs later.

In summary, the claim that the stated emissions reductions from signatory countries are not sufficient to limit warming to 1.5°C aligns with WG3 findings, which depict a gap between current commitments and the emissions pathway needed for 1.5°C. This underscores the need for stronger, faster, and more comprehensive mitigation across sectors to close the gap.

CLMTGR5001_002_2025_3 - Dynamics of Climate Variability and Chan Quiz Week 13

According to the IPCC Working Group 3 report, the stated emissions reductions from signatory countries are not enough to limit warming to 1.5ºC.

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