Fossil fuel emissions fall due to Iran war, renewables: Research

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 on Nov 10.

Emissions from the burning of oil, gas and coal – the main drivers of climate change – rose by 0.9% a 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% in 2026, according to the research, published as nations meet at the United Nations’ COP31 climate summit in Antalya, Turkey.

It would be the first annual drop since 2020, when the Covid-19 pandemic paralysed the global economy, trade and transport.

In 2026, the US-led war in Iran and the closure of the Strait of Hormuz played a role in driving emissions down as these 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 are 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.

Rebound looms

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-19 or the global financial crisis.

A rebound is likely “when the oil tensions go away”, she said in a media briefing.

Oil-related emissions are projected to drop 1.9%, but it is “likely a short-term response to the energy shock triggered by the Iran conflict”, the researchers said.

Gas emissions are set to fall 0.3%, while those from coal use will rise 0.6%.

Overall, fossil carbon dioxide emissions are expected to reach 38.2 billion tonnes in 2026.

Including emissions from land-use change such as deforestation, total CO2 emissions are projected to rise to 43.3 billion tonnes, from 42.8 billion tonnes in 2025.

The researchers said land-use emissions are projected to rise partly due to peat fires and forest degradation in South-east Asia, associated with drier conditions linked to the exceptionally strong El Nino climate pattern in 2026.

The report found that the world’s carbon budget – the amount of CO2 that can be emitted before global warming exceeds 1.5 deg C above pre-industrial levels – stands at 150 billion tonnes.

The researchers calculated that at the current rate, the carbon budget would be exhausted in less than four years.

Nations agreed at the 2015 UN climate talks in Paris to keep global warming “well below” 2 deg C above pre-industrial levels, while pursuing efforts to limit it to 1.5 deg C.

But the UN declared in September that the long-term 1.5 deg C target would be missed in a matter of years.

Scientists say it is crucial to reduce greenhouse gas emissions from fossil fuels to limit the period of “overshoot” above 1.5 deg C and bring temperatures back down as quickly as possible. AFP