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Climate change left unaddressed will cut incomes: Study

  • Market: Emissions
  • 16/04/26

Climate change could by 2050 "reduce income for the average person" by between 3pc and 15pc, measured in terms of GDP per capita, researchers at the London School of Economics' Grantham Institute on Climate Change and Environment found.

It is based on a "plausible worst case scenario" in which global temperatures rise by between 2.2-2.8°C above pre-industrial levels and assumes no further increase in adaptation — adjusting to the effects of climate change — the report said. Without much larger reductions in greenhouse gas (GHG) emissions, the impacts are likely to "intensify or even accelerate" in the second half of this century, it added.

"People in low- and lower-middle-income countries are expected to be disproportionately affected by climate impacts", facing average losses of 8-18pc of GDP per capita, the report found.

But "early and strategic adaptation investments can bolster economic stability, reduce debt levels and borrowing costs", it added. GDP per capita would stabilise by mid-century in a scenario aligned with the upper limit of the Paris climate agreement, according to the researchers.

The Paris agreement seeks to limit the global rise in temperature to "well below" 2°C above the pre-industrial average and pursues a 1.5°C threshold. The world is projected to warm by around 3°C by the end of the century based on current pledges.

The studies informing Grantham Institute estimates "are not comprehensive" and are "likely to be significant underestimates of the potential consequences", the report warned. They exclude some impacts from flooding and severe storms, as well as effects that are challenging to estimate, such as tipping points.

Early investment in adaptation would "bolster fiscal stability" by reducing the spending needed on losses from climate change, the report found. It combines findings from nearly 300 studies. Several studies have found the cost of inaction on climate change substantially outweighs the alternative.

Finance for cutting GHG emissions and adaptation is usually a central topic in multilateral climate talks such as UN Cop summits. Countries reached a new climate finance deal at Cop 29, in November 2024, whereby developed nations agreed to deliver $300bn/yr to developing countries by 2035.


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