A boom in Chinese solar power construction drove another record-breaking year of renewables growth in 2023, according to the International Energy Agency (IEA).
Carbon Brief analysis of figures in the IEA’s Renewables 2023 report show that the world is now on track to build enough solar, wind and other renewables over the next five years to power the equivalent of the US and Canada.
Rapid growth has also pushed the IEA to once again significantly upgrade its renewables forecast, adding an extra 728 gigawatts (GW) of capacity to a five-year estimate it made just a year ago. This is more than the electricity capacity of Germany and India combined.
The agency attributes this growth to plummeting costs of solar power and favourable policy regimes, particularly in China. New solar and onshore wind now provide cheaper electricity than new fossil fuel power plants almost everywhere, it says, as well as being cheaper than most existing fossil fuel assets.
Despite such accelerated expansion, the world is not currently on track to achieve the COP28 target of tripling renewables capacity by 2030, according to the IEA.
However, it proposes various measures to further increase deployment, including more finance for developing countries.
‘Step change’
Last year was a “step change for renewable power growth” as the world built an extra 507GW of renewable capacity, primarily solar and wind power, according to the IEA.
This was a 49% increase on the previous year’s construction. It marked the 22nd year in a row that renewable capacity addition reached record levels.
Over the six-year period 2023-2028, an additional 3,684GW of renewables is expected to come online under the IEA’s “main” forecast. This is double the current total of renewable capacity installed globally.
In 2023, solar power both at utility-scale and on rooftops amounted to three-quarters of capacity additions, primarily due to growth in China. Over the next five years, 73% of the 3,174GW of new capacity will be solar, again driven largely by China. (See: China leads.)
By Carbon Brief’s calculations, this 2024-2028 period is on track to see an extra 4,963 terawatt-hours (TWh) of electricity generation from renewable sources.
This amounts to one-sixth of the world’s electricity output in 2022. As the chart below shows, this is equivalent to covering the entire electricity demand of the US and Canada with newly-built renewables.

By 2028, the IEA forecasts that renewables will account for 42% of global electricity generation, with wind and solar power making up 25%. Despite showing no growth across this period, hydropower is still expected to be the largest single source of renewable power.
Taken together, the agency says renewables will overtake coal power as the largest source of power in “early 2025”. (A year ago, the agency said renewables would become the world’s largest electricity source within three years.)
One major driver of this growth is the plummeting cost of renewables, especially solar photovoltaics (PV). Spot prices for solar modules declined by almost 50% in 2023 compared to the previous year, according to the IEA.
Last year, 96% of newly installed utility-scale solar and onshore wind capacity generated cheaper electricity than new coal and gas plants, according to the IEA.
Moreover, three-quarters of new wind and solar power plants provided cheaper power than even existing fossil-fuel facilities.
The other key driver is the strong policy support that renewables enjoy in “more than 130 countries”, the IEA says. It notes that “policies remain key for attracting investment and enabling deployment”, with roughly 87% of the utility-scale renewable growth between 2023 and 2028 “expected to be stimulated by policy schemes”.
At the same time, the report highlights the impact of the “new macroeconomic environment” on the renewables sector, with inflation and high interest rates raising costs. Offshore wind has been hardest hit, with the IEA’s forecast for its growth outside China dropping by 15%.
The report also examines renewable heat consumption and the use of biofuels. Both are set to grow considerably in the coming years, but the IEA says neither are currently on track for the trajectories seen in its net-zero scenario, which aligns with the Paris Agreement.
Record revision
As a result of this growth, the IEA has again significantly raised its forecast for renewables capacity expansion, by a record amount.
It now sees an additional 728GW being built in the 2023-2027 period compared to its forecast from 2022 – a 33% increase. This is notable considering that, last year, the agency described a five-year 424GW adjustment as its “largest ever upward revision”.
The chart below shows the 120GW divergence between actual renewables growth in 2023 – some 507GW – and the forecast for that year of 387GW, made by the IEA in 2022.

The IEA has a long history of making relatively conservative predictions for renewable growth that are subsequently outstripped by reality, due to a combination of more favourable policy conditions and faster-than-expected cost reductions.
Forecasts from previous IEA renewables reports issued in 2020 and 2021 showed annual renewable growth rates remaining fairly stable at around 200GW and 300GW per year for the following five years, respectively.
However, these forecasts have not been included in the chart above as, for the first time, the agency has converted all of its solar power values to direct current, resulting in slightly different GW values. This means previous forecasts are not directly comparable, although the 2022 forecast figures have been converted for this purpose.
China leads
A key conclusion from the IEA’s new report is the global dominance of China in deploying solar and other renewables, which is set to increase in the coming years.
In the period 2005-2010, China built 39% of the world’s new renewable energy capacity. This increased to 47% in the 2017-2022 period and the IEA expects it to rise to 59% between 2023 and 2028. This can be seen in the chart below.
By 2028, the agency estimates that nearly half of China’s electricity will be generated by renewables. According to Ember, as of 2022 only around 30% of China’s electricity was from renewables.
During this period, the nation is set to deploy four times more renewables than the EU and five times more than the US.

This growth is being driven by the nation’s success in solar power manufacture and installation, according to the IEA. In “almost all provinces”, generation costs for new utility-scale solar and onshore wind are now lower than for coal, which is generally used as the benchmark for electricity prices, the agency says.
The IEA attributes this progress to policy measures, including power market reforms, green certificate systems and province-level financial support to support rooftop solar installation. It also points to a “supply glut” that has helped solar module costs “plummet drastically”.
As China accounts for 90% of the upwards revision in the IEA’s forecast out to 2028, it notes that the nation’s solar achievements actually “hide slower progress in other countries”.
There have been a number of significant supportive policy changes in other countries and regions, however.
The US and the EU are expected to see renewable installation rates double across 2023-2028, compared to the previous six-year period – in both cases due primarily to solar expansion. The IEA attributes this to the US Inflation Reduction Act and supportive national policies – such as government renewable power auctions – across European nations.
The report also highlights the success of supportive policies in India and Brazil. It notes that while renewables are set to expand rapidly in sub-Saharan Africa – particularly South Africa – the region “still underperforms considering its resource potential and electrification needs”.
Tripling renewables
At COP28, nearly every government in the world agreed to a target of tripling global renewables capacity by 2030. This would bring the total to 11,000GW, which is in line with the IEA’s own net-zero scenario.
As it stands, the new report concludes that under the IEA’s “main case” forecast, shown in yellow in the chart below, renewable capacity would increase to 7,339GW in 2028.
Following that trajectory, capacity would reach around 9,000GW in 2030 – roughly an increase to 2.5 times current levels.
This forecast is based on existing policies and takes into account “country-specific challenges that hamper faster renewable energy expansion”, the IEA says.
By contrast, the IEA’s “accelerated case” involves governments “overcom[ing] these challenges and implement[ing] existing policies more quickly”.
In this scenario, shown in red below, renewables growth is around 21% higher. Capacity increases to 8,130GW in 2028, putting the world on track for the tripling by 2030 target.

The IEA lists a handful of broad measures that governments could take to achieve an “accelerated” trajectory.
These include: improved policy responses to the “new macroeconomic environment” such as higher inflation; more investment in grid infrastructure; and dealing with “cumbersome administrative barriers and permitting procedures and social acceptance issues”.
The IEA notes that “the lack of affordable financing remains the most important challenge to renewable project development in most EMDEs [emerging markets and developing economies], especially in countries where renewable policy uncertainties also increase project risk premiums”.
It emphasises the need to boost financing for EMDEs to overcome this barrier. Last year, renewable growth was concentrated in just 10 nations and tripling renewables requires “a much faster deployment rate…in numerous other nations”, the IEA says.
The post Analysis: World will add enough renewables in five years to power US and Canada appeared first on Carbon Brief.
Analysis: World will add enough renewables in five years to power US and Canada
Climate Change
‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak
Antarctic sea ice has recorded its third-smallest winter peak extent since satellite records began 48 years ago, new data reveals.
Provisional data from the US National Snow and Ice Data Center (NSIDC) shows that Antarctic sea ice hit its annual winter peak on 14 September, with an extent of 17.59m square kilometres (km2).
The organisation notes that the data is still preliminary, adding that “large fluctuations in extent are typical of Antarctic sea ice near the seasonal maximum”.
One expert tells Carbon Brief that it is “concerning to see these low values persisting”, but says that scientists need more time to determine whether this represents a “structural shift” in Antarctic sea ice extent.
Meanwhile, at the Earth’s other pole, Arctic sea ice reached its annual minimum on 12 September, ranking as the joint-10th lowest in the satellite record.
The NSIDC notes that the last 20 years have seen the lowest 20 Arctic sea ice extents in the satellite record.
Antarctic peak
Dr Lettie Roach, a polar climate scientist at the Alfred Wegener Institute in Germany, tells Carbon Brief that this year’s Antarctic sea ice maximum was “well below average for the season”. She warns that, “after several decades of stable or increasing winter Antarctic sea ice conditions, it is concerning to see these low values persisting”.
She adds:
“Compared with the Arctic, it’s less clear how recent changes in Antarctic sea ice are attributable to human-caused warming vs natural variability. We need more years of observations to better understand whether this is truly a structural shift.”
Dr Clare Eayrs, a postdoctoral researcher at the Korea Polar Research Institute (KOPRI), tells Carbon Brief that, since recording a “near-average February minimum” extent, Antarctic sea ice has “returned to unusually low winter coverage”.
She notes that Antarctic sea ice extent in July and August this year were the fifth and fourth lowest on record, respectively, adding that “all five of the lowest July extents have occurred since 2022 and all four of the lowest August extents since 2023”.
The chart below shows Antarctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2023 (mid blue), the year of the smallest winter sea-ice maximum on record.

Eayrs tells Carbon Brief that the regional pattern of Antarctic sea ice cover “changed substantially during the growth season”.
For example, she says that “in April, the Bellingshausen Sea remained almost entirely ice-free, while the neighbouring Amundsen Sea had more ice than usual”.
However, by late August, changes in atmospheric pressure and wind meant that “the Bellingshausen deficit had largely recovered, while ice was unusually scarce in the Amundsen Sea and across much of East Antarctica”.

Arctic minimum
Meanwhile, the Arctic recorded its minimum summer sea ice extent on 12 September. At 4.60m km2, this year ties with 2025, 2010 and 2008 as the 10th-lowest sea ice extent on record.
The chart below shows Arctic sea ice extent in 2025 (dark blue) and 2026 (red) so far. For comparison, the chart shows decadal averages (dotted lines) as well as 2012 (mid blue), the year of the smallest summer sea-ice minimum on record.

Roach tells Carbon Brief that although this minimum is not “record setting”, it is still “lower than any sea ice minimum before 2007”. She adds:
“Human-caused climate change has reduced Arctic sea ice cover and thickness, so the region is fundamentally different compared to a few decades ago.”
Scientists have been tracking Arctic sea ice thickness using a reanalysis produced called the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) since 1979.
In March 2026, the National Oceanographic and Atmospheric Administration (NOAA) terminated a global dataset of air pressure that scientists relied upon to produce PIOMAS, forcing both datasets to stop publishing updates.
The PIOMAS website says it will take “considerable effort and time” to find alternative data to use in their reanalysis. It adds that “we don’t yet have a good sense if that’s possible with available funds and if so, when we will be able to resume production of a new PIOMAS timeseries”.
Roach also notes that August saw record-breaking heat sweep across much of the world, explaining that high temperatures “extended into Arctic coastal regions, close to regions with substantial sea ice loss – particularly the Barents-Kara and East Siberian seas”.
Dr Zack Labe, a scientist at Climate Central, tells Carbon Brief that the absence of a new record does not mean that ice cover is becoming more “resilient”. He says:
“Local weather patterns across the Arctic play a really important role in year-to-year sea-ice extent, even as the long-term trend is clearly downward.”
Labe tells Carbon Brief that weather in the Arctic this summer was “influenced mainly by lower pressure toward the central Arctic, which brought cloudier and cooler conditions that limited surface melt and delayed the start of the melt season”.
He explains that this “was most obvious across parts of the Beaufort and Chukchi seas, where the melt season didn’t really kick off until after early July, which was more than two weeks later than normal”.
In contrast, he says, the Atlantic side of the Arctic “had a much more extreme summer”, with sea ice in the Barents Sea recording its “earliest melt-out on record”.
This was partly due to “unusually warm air and ocean temperatures”, Labe says. He notes, for example, that parts of western Siberia saw unusually persistent temperatures more than 5C above the 1981-2010 average for much of the summer, which extended out over the Kara Sea and contributed to substantial ice melt in this area”.

Labe tells Carbon Brief that, going forward, scientists need “more data and observations of other sea-ice metrics, like ice thickness, which may give us better insight into the overall condition of the ice pack, especially during years like 2026 when it is very fragmented”.
(In March 2026, Arctic sea ice reached its peak extent for this winter, clocking in as the joint-smallest in a satellite record going back almost half a century.)
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The post ‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak appeared first on Carbon Brief.
‘Concerning’ low sea ice persists as Antarctic hits third-lowest winter peak
Climate Change
COP31 attendees told not to interfere in Türkiye’s “internal affairs”
Participants at COP31 in Antalya will have a “duty” not to interfere in Türkiye’s internal affairs under the country’s hosting deal with the UN, reviving a clause dropped for last year’s climate summit in Brazil that human rights groups warn could put activists at risk.
Türkiye has faced growing criticism from human rights groups over the jailing of opposition figures, journalists and activists and imposed a blanket protest ban around July’s summit of the NATO military alliance in Ankara.
The contested provision is included in the binding agreement between the UN climate secretariat and the Turkish government that sets out responsibilities over logistical arrangements and details participants’ rights and obligations.
The document, signed in June but only made public on Wednesday, gives accredited COP31 attendees immunity from legal action over what they say, write or do in connection with the conference. Climate Home News understands that this safeguard can be applied to what takes place both inside and, in certain circumstances, outside of the UN-controlled COP “Blue Zone”. For the first time, this protection explicitly continues after the summit ends.

But participants enjoying these “privileges and immunities” also have a duty to respect Türkiye’s laws and regulations and not to interfere in its internal affairs, the agreement states. Rights groups fear its wide-ranging formulation could be used to discourage criticism of the host government.
Climate Home News understands that whether an action is covered by the immunity or infringes on the host’s internal affairs would be evaluated on a case-by-case basis, with close coordination between the country’s authorities and the UN climate change body.
A separate provision states that immunity shall be waived where the UN believes it would “impede the course of justice”.
‘Chilling effect’
Those same provisions featured in the host country agreements for COP28 in the United Arab Emirates and COP29 in Azerbaijan, both regarded as authoritarian regimes, before being dropped for COP30 in Brazil.
Ann Harrison, climate justice policy advisor at Amnesty International, said it is “extremely disappointing” that the COP31 agreement re-introduced clauses that could “hinder the ability of human rights defenders and civil society organisations to conduct their work safely”.
COP31 electrification pledge leaves out clean power commitment
She added the provisions could have a “wider chilling effect” on rights to freedom of expression and peaceful assembly, given concerns over the human rights situation in Türkiye, including laws that “have shrunk civic space” and their “abusive” implementation by authorities.
The UN climate change body declined to comment.
Rights groups have documented blanket protest bans, unlawful use of force by the police and prosecutions of journalists, human rights defenders and lawyers across Türkiye in the last year.
Arrests and protest bans
Last July, environmental activist Esra Işık was sentenced to more than two years for “resisting” a public official over what Amnesty International described as a peaceful protest against an urgent expropriation order linked to the expansion of coal mining in south-western Türkiye. She is appealing the conviction.
Ahead of a summit of the NATO alliance in the capital Ankara in July, authorities put in place a 13-day blanket ban on demonstrations, citing “national security”, and arrested over 200 people. Human Rights Watch said the crackdown showed Türkiye’s “ruthless intolerance of freedom of speech and assembly”.
Earlier this month, Turkish police detained dozens of people as part of what rights groups described as the government’s widening crackdown on LGBTQ+ activists and venues.
Questioned by media as to how he would guarantee the right to protest at COP31, Kurum said earlier in September that his team would “try to meet” any request they receive from civil society and give them “a free space to express themselves”.
“Don’t worry, thinking you will not be able to voice your opinions or really share your thoughts,” he said in an attempt to reassure campaigners, adding that he had put former deputy environment minister Mehmet Birpinar in charge of liaising with civil society.
Civic space needed
Camilla Pollera, human rights and climate change campaigner at the Center for International Environmental Law (CIEL), said meaningful participation at COP31 is fundamental to the legitimacy of climate action.
“At a climate summit, civil society participation necessarily includes being present, speaking out, scrutinising governments’ decisions and climate policies, and advocating for communities most vulnerable to climate change,” she added.

At last year’s COP30 summit, thousands of Indigenous people and climate activists peacefully marched through the Amazonian city of Belém in the first major demonstration outside the UN venue in four years. Smaller-scale demonstrations were largely confined to the “Blue Zone” at COP27 in Egypt, COP28 in the UAE and COP29 in Azerbaijan.
In two other separate incidents in Belém, members of the Munduruku tribe blocked access to the conference centre for hours, demanding an end to development projects in their ancestral land, and protesters stormed through the venue clashing with UN security officials.
The COP31 hosting agreement keeps some of the safeguards previously hailed by civil society groups. The government and the UN secretariat commit to upholding “the fundamental human rights” of all participants in the agreement’s preamble.
Under the deal, Türkiye also needs to ensure that security personnel follow “the highest ethical and professional standards and are expected to behave with integrity and respect”.
The post COP31 attendees told not to interfere in Türkiye’s “internal affairs” appeared first on Climate Home News.
COP31 attendees told not to interfere in Türkiye’s “internal affairs”
Climate Change
Threatened by rising seas, small islands secure right to keep their statehood
As rising seas submerge growing swathes of land, countries that lose territory should still keep their national boundaries, sovereign rights and UN membership, according to a political declaration adopted at the UN General Assembly in New York on Thursday.
The declaration, which was championed by climate-vulnerable small island states, affirms “the presumption in favour of continued statehood” in the face of sea level rise fuelled by climate change, and urges countries to work together to assist communities affected by encroaching oceans.
Speaking at a high-level UN meeting to address the existential threats posed by sea level rise, Cabo Verde’s Prime Minister Francisco Carvalho, one of the initiative’s co-facilitators along with Australia, said the adoption of the text by consensus sends “a message of hope”.
“This declaration has a very special meaning. For us, sea level rise is neither a distant threat nor a theoretical concern,” he said, adding that rising seas put at risk key infrastructure, water resources and economic growth in small island states.
In the Pacific, sea levels have risen at twice the global rate, dramatically increasing coastal flooding events from two to 20 a year in the Republic of the Marshall Islands, and from zero to 102 events per year in American Samoa, according to the World Meteorological Organization (WMO).
Surangel Whipps Jr., president of the Pacific island of Palau, said the summit in New York represents a “moment of international solidarity”, and highlighted that small island states will remain permanent members of the UN.
Declaration recognises statehood
An advisory opinion by the world’s top maritime court, the International Tribunal on the Law of the Sea (ITLOS), first upheld in 2024 that countries do not have to shrink their maritime borders even if they lose land territory due to sea level rise. This was reiterated by the International Court of Justice in last year’s landmark ruling on the climate obligations of states.
The new declaration endorsed by all governments at the UN General Assembly stresses that sea level rise “is not a distant scenario but a real and lived experience for many”, and notes that international law must be implemented in global responses to rising seas.
UN Secretary-General António Guterres said the “milestone must now be translated into action”, adding that the declaration should encourage an “ongoing dialogue” at the “highest possible level” leading to practical outcomes. Pacific islands have proposed an international treaty on sea level rise that would provide more legal certainty.
“Those on the frontlines must be front and centre on every decision. We cannot allow countries and cultures to vanish beneath the waves,” he said. “The SOS has gone out. The world must answer.”
At regional summit, Pacific islands ask for COP31 support for clean energy and finance
Goodwin Friday, prime minister of St. Vincent and the Grenadines, said measures to protect vulnerable states will require adequate finance. “Investing in resilience now is more cost-effective than paying the far greater price for loss and damage later,” he added.
Championed by Australia’s COP31 co-presidency, Pacific islands have sought to put adaptation to sea level rise and ocean conservation at the top of the political agenda by inviting world leaders to attend the pre-COP31 summit co-hosted by Fiji and Tuvalu in October.
Tuvalu will also host the second global fossil fuel phase-out summit in April 2027, after around 60 governments met this year in Santa Marta, Colombia, to discuss ending their dependence on coal, oil and gas.
“Our coastlines, our reefs and our communities are living with the consequences of fossil fuel dependence every day, and our people have earned the right to help shape the way forward,” Lynda Tabuya, Fiji’s climate minister, said in a statement announcing details of the conference.

Ocean monitoring gets a boost in New York
Amid record-breaking marine heat and seas rising at unprecedented speed, governments in New York announced new commitments to protect the world’s ocean, as efforts to bolster marine ecosystems and coastal communities rise up the political agenda.
On Wednesday, the EU and Canada announced more funding for a new Europe-led ocean monitoring system called OceanEye, launched in the aftermath of a failed attempt by the Trump administration to dismantle the largest existing network of deep-sea observatories.
During an event at UN headquarters in New York, EU President Ursula von der Leyen and Canadian Prime Minister Mark Carney announced around $163 million in new funding for the initiative, with the EU pledging €92 million ($105m) on top of existing seed funding and Canada pledging C$82 million (US$58m) over five years.
According to an EU statement, while OceanEye will collaborate with the Global Ocean Observing System, that network “remains vulnerable to financial shortfalls and geopolitical disruptions”. A group of 30 countries from Europe, Africa and the Americas joined an international initiative in support of OceanEye, including large coastal nations like Brazil, Namibia and Mexico.
Von der Leyen said OceanEye “can make us the leading ocean data provider in a matter of years”, including by launching new satellites and installing new observatories in the deep ocean. “From outer space to the deepest ocean, our funding helps us keep watch beneath the waves,” she added.
Carney said the initiative would help protect Canada’s Arctic region with real-time monitoring operating year-round. “We can’t protect what we can’t see,” he said, also highlighting that Canada had expanded conservation of its ocean territory from 1% a decade ago to 15% now.
In New York, a group of 19 countries said they are either developing or implementing plans to sustainably manage all of their ocean territory, with 12 new nations joining the initiative. In a joint communiqué, they called on more countries to sign up ahead of COP31.
Warnings of El Niño-fuelled extreme heat
Scientists and world leaders have raised the alarm over this year’s record-breaking marine temperatures, which have persisted above historical peaks for more than 100 days as the naturally occurring El Niño phenomenon intensifies in the Pacific.
Extreme ocean heat could become a threat to coastal ecosystems and communities, experts fear. Water temperatures 1.5C above normal levels have also rapidly fuelled a strong hurricane in the Pacific in recent days.
Despite scientific calls for additional ocean conservation efforts, a report launched this week in New York warned that efforts to protect ocean ecosystems are lagging behind, with only 10% of the global ocean covered by conservation areas and just 3.5% designated as “effectively protected”.
The post Threatened by rising seas, small islands secure right to keep their statehood appeared first on Climate Home News.
Threatened by rising seas, small islands secure right to keep their statehood
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