Fossil Fuel Emissions Fall due to Iran War, Renewables: Research

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Antalya, Turkey—Global fossil fuel emissions are projected to fall slightly in 2026 due to the expansion of renewable energy and the oil price ...

Antalya, Turkey—Global fossil fuel emissions are projected to fall slightly in 2026 due to the expansion of renewable energy and the oil price shock sparked by the Iran war, researchers said Tuesday.

Emissions from the burning of oil, gas and coal -- the main drivers of climate change -- rose by 0.9 percent per year on average in the past decade, hitting a record high in 2025, according to the Global Carbon Budget report.

But they are expected to drop by 0.4 percent in 2026, according to the research, published as nations meet at the UN's COP31 climate summit in Antalya, Turkey.

It would be the first annual drop since 2020, when the Covid pandemic paralysed the global economy, trade and transport.

This year, the US-led war in Iran and closure of the Strait of Hormuz played a role in driving emissions down as it caused a drop in oil consumption amid soaring crude prices, the researchers found.

The deployment of solar panels, wind farms and electric vehicles also contributed to the drop. Two thirds of the increase in global energy demand is being met by solar and wind power and electric vehicles, the report found.

"A decline in fossil CO2 emissions is encouraging, but a reduction driven partly by geopolitical shocks is not a sustainable climate solution," said Pierre Friedlingstein, director of the Global Carbon Budget Office at the University of Exeter in Britain.

"The long-term answer remains the rapid deployment of clean energy technologies," said Friedlingstein, who led the study published in the journal Earth System Science Data.

Corinne Le Quere, a climate change science professor at the University of East Anglia, noted that emissions rebounded when economies recovered following shocks such as Covid or the global financial crisis.

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