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SEI experts in Carbon Brief: Why all fossil fuels must decline rapidly to stay below 1.5°C

SEI Research Fellow Ploy Achakulwisut and Affiliated Researcher Peter Erickson co-authored a guest post in Carbon Brief, detailing their recently published research on climate mitigation scenarios compiled in the Intergovernmental Panel on Climate Change (IPCC) sixth assessment report (AR6) and what they say about how quickly the world must wean itself off fossil fuels to head off long-term global warming above 1.5°C.

Published on 26 October 2023
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Lynsi Burton / lynsi.burton@sei.org

Fracking rig against a pale blue sky with trees in the background

Fracking rig in rural western Pennsylvania, US.

Brad Weaver / Unsplash

New research recently published in Nature Communications found that, after scrutinizing hundreds of climate mitigation scenarios contained in the IPCC AR6 report, global coal, oil and gas supply must decline by an average of 95%, 62% and 42%, respectively, from 2020 to 2050 in order to limit long-term warming to 1.5°C with no or limited overshoot of that ceiling.

In their column for Carbon Brief, the researchers explain that while there is relative consensus about the pace of phase-out needed for coal and oil, the role of gas varies widely across scenarios, with some including possibly untenable dependence on carbon capture and storage (CCS) and carbon dioxide removal (CDR).

Given that so many pathways rely on more CCS and CDR than what experts believe is achievable, narratives describing gas as a “bridge” or “transition” fuel may be misplaced, the authors argue.

Regardless, phasing out all three forms of fossil fuels would bring a multitude of benefits, the piece says, including protecting human rights and ecosystems in addition to cutting greenhouse gas emissions. Consequently, the production and consumption of fossil fuels must decline steeply and rapidly between now and 2050.

Featured research

Featuring

Ploy Achakulwisut

Research Fellow

SEI Asia

Peter Erickson

SEI Affiliated Researcher

SEI US

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