In its annual report on the electricity market, the IEA said that renewables -- in particular from solar panels -- should see their share of total electricity production surpass a third of the total, passing from 30 percent last year to 37 percent in 2026.
If nuclear power, which the IEA sees hitting a record next year, is included, almost half of the world's electricity will be generated by low-emissions sources by 2026, up from a share of just under 40 percent in 2023.
The strong growth in renewables will outpace the increased demand for electricity in industrialised countries as part of efforts to reach carbon neutrality, said the IEA.
"The power sector currently produces more CO2 emissions than any other in the world economy, so it's encouraging that the rapid growth of renewables and a steady expansion of nuclear power are together on course to match all the increase in global electricity demand over the next three years," said IEA Executive Director Fatih Birol.
That may also turn out to be the case in China, where coal produces more than half of electricity, but much depends on hydroelectric production and the pace of the economic recovery.
Nevertheless, the IEA sees a slow structural decline in coal use, even if developing nations will account for most of the increase in electricity demand in coming years.
It expects electricity produced from coal to drop by 1.7 percent per year on average through 2026, after a 1.6 percent increase last year due to low levels of hydroelectric power produced in China and India.
Electricity produced from natural gas should increase by around 1 percent per year during the period.
The IEA expects electricity produced from nuclear power plants to hit next year the record level it set in 2021 as France finishes repairing a number of reactors and new ones are brought on line in China, India, Japan and South Korea.
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