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Unextractable fossil fuels in a 1.5 °C world
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Journal Article
Unextractable fossil fuels in a 1.5 °C world
2021
Overview
Parties to the 2015 Paris Agreement pledged to limit global warming to well below 2 °C and to pursue efforts to limit the temperature increase to 1.5 °C relative to pre-industrial times
1
. However, fossil fuels continue to dominate the global energy system and a sharp decline in their use must be realized to keep the temperature increase below 1.5 °C (refs.
2
,
3
,
4
,
5
,
6
–
7
). Here we use a global energy systems model
8
to assess the amount of fossil fuels that would need to be left in the ground, regionally and globally, to allow for a 50 per cent probability of limiting warming to 1.5 °C. By 2050, we find that nearly 60 per cent of oil and fossil methane gas, and 90 per cent of coal must remain unextracted to keep within a 1.5 °C carbon budget. This is a large increase in the unextractable estimates for a 2 °C carbon budget
9
, particularly for oil, for which an additional 25 per cent of reserves must remain unextracted. Furthermore, we estimate that oil and gas production must decline globally by 3 per cent each year until 2050. This implies that most regions must reach peak production now or during the next decade, rendering many operational and planned fossil fuel projects unviable. We probably present an underestimate of the production changes required, because a greater than 50 per cent probability of limiting warming to 1.5 °C requires more carbon to stay in the ground and because of uncertainties around the timely deployment of negative emission technologies at scale.
A global energy system model finds that planned fossil fuel extraction is inconsistent with limiting global warming to 1.5 °C, because the majority of fossil fuel reserves must stay in the ground.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ Aviation
/ Carbon
/ Coal
/ Conservation of Energy Resources - legislation & jurisprudence
/ Fossil Fuels - supply & distribution
/ Fuel Oils - supply & distribution
/ Global Warming - legislation & jurisprudence
/ Global Warming - prevention & control
/ Humanities and Social Sciences
/ International Cooperation - legislation & jurisprudence
/ Methane - supply & distribution
/ Oil
/ Paris
/ Regions
/ Science
