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Emissions must peak by 2025 for 1.5°C: IPCC

  • Spanish Market: Crude oil, Electricity, Emissions, Hydrogen, Natural gas, Oil products
  • 04/04/22

Global greenhouse gas (GHG) emissions must peak before 2025 to keep global warming within Paris climate agreement limits, the Intergovernmental Panel on Climate Change (IPCC) said today, entailing a rapid shift away from unabated fossil fuel use.

Global GHG emissions must peak before 2025 at the latest in scenarios aiming to limit global warming to 1.5°C or 2°C compared with pre-industrial levels, the IPCC finds in its latest working group report on climate change mitigation. The 2015 Paris climate agreement aims to limit global warming to well below 2°C and preferably to 1.5°C.

GHG emissions must be reduced by 43pc and methane by a third by 2030 to meet the 1.5°C target, while GHG emissions would need to be cut by a quarter by the end of the decade to meet 2°C, the IPCC says, with "rapid and deep and in most cases immediate" reductions needed across all sectors for both targets. In either case it is "almost inevitable" that the temperature threshold will be breached temporarily, but it could be brought back below the limit by 2100.

The IPCC recognises that progress has been made in climate action. But policies implemented by the end of 2020 would still see emissions peak later than 2025, and lead to global warming of between 2.2-3.5°C by the end of the century, its report finds. They are also projected to yield higher GHG emissions than those implied by National Determined Contributions (NDCs), pointing to an "implementation gap", according to the report.

CCS to limit stranded assets

A "substantial reduction" in fossil fuel use in the energy sector is needed to meet either the 1.5°C or 2°C target, alongside widespread electrification, deployment of alternative fuels such as hydrogen, and improvements to energy efficiency.

Limiting global warming to these levels will lead to the stranding of fossil fuel assets, as soon as this decade in the case of coal installations and towards the middle of the century for oil and gas. The economic impact could reach trillions of dollars.

But the use of carbon capture and storage (CCS) would reduce the risk of stranded assets by prolonging the potential use of fossil-fuel installations. Without CCS, the world's coal-fired power plants would be forced to retire 23 years earlier than their expected lifetimes, and gas plants 17 years earlier, if the temperature targets to be met. New investments in coal-fired electricity without CCS are inconsistent with the targets, the report finds.

Beyond the energy sector

Achieving net zero emissions in industry — which produces around a quarter of global emissions — is "challenging but possible", the IPCC said. This will require coordinated action throughout value chains, including new production processes using electrification, hydrogen and "where necessary" CCS. Efficiency, reuse and recycling can also minimise industry emissions.

Established, new and rapidly growing cities all present options for emissions cuts, the IPCC finds, whether through the use of low-emission energy sources, zero-carbon buildings, or the electrification of transport. Electric vehicles using low-emission power "offer the largest decarbonisation potential for land-based transport on a lifecycle basis", the report concludes.

Demand-side mitigation through lifestyle and behavioural changes represents "untapped potential" which could cut emissions by 40-70pc by mid-century, provided the necessary policy, infrastructure and technology are in place, the IPCC said.

Land use mitigation can significantly reduce emissions, as well as removing and storing CO2 from the atmosphere. But this should not be used to compensate for delays in emissions cuts in other sectors, the IPCC warns.

It expects the use of carbon removals to be "unavoidable" to address hard-to-abate residual emissions. But the scale and timing of their deployment will be subject to the progress of emissions cuts in individual sectors.


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