China’s historical emissions within its borders have now caused more global warming than the 27 member states of the EU combined, according to new Carbon Brief analysis.
The findings come amid fraught negotiations at COP29 in Baku, Azerbaijan, where negotiators have been invoking the “principle of historical responsibility” in their discussions over who should pay money towards a new goal for climate finance – and how much.
Carbon Brief’s analysis shows that 94% of the global carbon budget for 1.5C has now been used up, as cumulative emissions since 1850 have reached 2,607bn tonnes of carbon dioxide (GtCO2).
While developed countries have used the majority of this budget, the analysis shows that China’s historical emissions reached 312GtCO2 in 2023, overtaking the EU’s 303GtCO2.
China is still far behind the 532GtCO2 emitted by the US, however, according to the analysis.
Indeed, China is unlikely to ever overtake the US contribution to global warming, based on current policies, committed plans and technology trends in both countries. This is even before accounting for the potential emissions-boosting policies of the incoming Trump presidency.
In addition, China’s 1.4 billion people are each responsible for 227tCO2, a third of the 682tCO2 linked to the EU’s 450 million citizens – and far below the 1,570tCO2 per capita in the US.
The new analysis follows Carbon Brief’s 2021 analysis of historical responsibility, based on emissions taking place within each country’s present-day borders or considering emissions embedded in imports. Further analysis in 2023 assigned responsibility to colonial rulers.
(A table at the end of this article shows which countries have the largest historical emissions according to the full range of metrics, including emissions per person.)
Animated chart shows the cumulative historical emissions of key countries since 1850. Credit: Joe Goodman / Carbon Brief
History matters
Historical CO2 emissions matter for climate change, because there is a finite “carbon budget” that can be released into the atmosphere before a given level of global warming is breached.
For example, in order to limit warming to 1.5C above pre-industrial levels, only around 2,800GtCO2 can be added to the atmosphere, counting all emissions since the pre-industrial period. (This is according to a 2023 study updating figures from the Intergovernmental Panel on Climate Change.)
Cumulative emissions since 1850 will reach 2,607CO2 by the end of 2024, according to Carbon Brief’s new analysis, meaning that some 94% of the 1.5C budget will have been used up.
These cumulative historical emissions are directly and proportionally linked to the amount of global warming that has already been seen to date.
Conclusions adopted by countries at the end of the first week at COP29 also make this link, in light of 2024 being on track to be the hottest year on record:
“The [subsidiary body to the UN climate process] SBSTA…expressed utmost concern about the state of the global climate system…with 2024 being on track to be the hottest year on record, which is primarily a result of the long-term warming caused by emissions from pre-industrial times until now.”
In addition, draft text on the new climate finance goal explicitly links responsibility for global warming to finance “burden-sharing arrangements” – meaning who should pay and how much.
In one passage of a draft published on 16 November 2024, there is a reference to the “principle of historical responsibility”. Another passage says that developed-country cumulative emissions should be used as a “proxy for historic responsibility for climate change”. The draft states:
“[D]eveloped country parties shall establish burden-sharing arrangements to enable the delivery of the [new climate finance] goal based on cumulative territorial CO2 emissions…as a proxy for historic responsibility for climate change.”
An alternative option in the draft says that countries should have to contribute to the new climate finance target if they are one of the world’s “top 10 emitters” based on cumulative emissions – and if they have average per-capita incomes above a certain level.
(If agreed, this would mean China, as a top-10 historical emitter, being obliged to contribute to climate finance. However, the draft is not final and is likely to change significantly. Many parts of the draft are enclosed in square brackets, indicating that they are not agreed.)
At the annual UN climate talks, it is also common for developing countries to remind developed nations that they have used up a large share of the world’s carbon budget – and that they should, therefore, be making stronger efforts to cut their emissions.
For example, in the closing plenary of the first week at COP29, Saudi Arabia “lamented depleted carbon budgets…in light of historic cumulative emissions as well as developed countries’ insufficient mitigation efforts”, according to the Earth Negotiations Bulletin.
China’s rising contribution
It is true that developed countries have been the leading contributors to historical emissions. This is despite the fact that China now has the world’s highest emissions on an annual basis.
Put another way, developed countries have made a disproportionately large contribution to current global warming, particularly when considering the number of people that live in them.
This is a key reason why the Paris Agreement says they “should continue taking the lead” on cutting their emissions – and why they must provide climate finance for developing nations.
The 1992 UN climate convention (UNFCCC) listed “developed” countries in Annex I, based on membership of the Organization for Economic Cooperation and Development at the time.
The convention says that the “largest share of historical and current global emissions of greenhouse gases has originated in developed countries”.
Indeed, at the time of the convention being agreed in 1992, Annex I countries accounted for 22% of the world’s population and a disproportionately large 61% of historical emissions.
By the end of 2024, however, Annex I countries’ share of cumulative historical emissions will have fallen to 52% of the global total. Carbon Brief’s analysis suggests that developing countries – those outside Annex I – will account for a majority of historical emissions in roughly six years.
China’s rapidly rising contribution to cumulative emissions is a major driver of this shift.
In 1992, China’s historical emissions were around two-fifths (41%) the size of the EU’s. By 2015, when the Paris Agreement was finalised, they were still only four-fifths (80%) of the EU’s total.
By the end of 2023, Carbon Brief’s analysis shows that China’s cumulative emissions (red line in the figure below) had overtaken those from the 27 EU member states (yellow).
Still, it is worth emphasising that China’s emissions remain far behind those of the EU on a per-capita basis.
When weighting historical emissions per head of population in 2024, China’s contribution is just 227tCO2 per capita, less than a third of the 682tCO2 for people in the EU27.
(There are several other ways to measure historical contributions. These include adjustments to account for CO2 embedded in imported goods and services, or shifting responsibility under periods of colonial rule. See the table below to compare countries using different metrics.)
US still most responsible
While China is now the world’s second-largest contributor to historical emissions, ahead of the EU27, it remains far behind the US, as shown in the figure below.
With cumulative emissions of 537GtCO2 by the end of 2024, the US total is two-thirds higher than China’s and three-quarters above the EU27.
Still, China is closing the gap, given its annual emissions are now roughly double those of the US. This is clear from the slope of the curves in the chart above, where China’s line is rising steeply.
China may never overtake the US
The fact that China’s annual emissions are so much higher than those from the US begs the question of when might it overtake the US, in terms of its cumulative historical total.
A 2023 article in the Washington Post attempted to answer this question, asserting that China would overtake the US in 2050. However, it used implausible projections in which annual emissions from the US, China and Europe remained almost unchanged for decades.
To attempt a more plausible answer, Carbon Brief has used data from the latest International Energy Agency (IEA) World Energy Outlook, published in October 2024.
Specifically, Carbon Brief looked at how annual emissions in China, the US and EU27 might change under “current policy settings” in the IEA’s “stated policies scenario” (STEPS). This reflects governments’ current and committed plans, as well as the latest energy-price trends.
The dashed lines in the figure below illustrate how the annual emissions of the US, EU and China are each expected to fall steeply under those current policy settings.
Adding these annual emissions outlooks to the historical totals up to this year suggests that China may never overtake the US in terms of its cumulative emissions, as shown in the figure below.
Emissions outlooks are by their nature uncertain. For example, China’s emissions might fail to fall as fast as the IEA expects – or the US might go faster than expected.
On the other hand, the impact of the incoming Trump presidency rolling back climate rules and aiming to “drill baby, drill” would make it even less likely that China would ever overtake the US.
Whether or not China overtakes the US in terms of its historical emissions, it is unlikely to escape pressure to contribute to global flows of climate finance.
At COP29, Ding Xuexiang, Chinese president Xi Jinping’s “special representative” and the nation’s executive vice-premier, notably used the UN language of climate finance to describe Chinese overseas aid for the first time. However, China has insisted that it will only provide such finance voluntarily.
About the data
This analysis is based on historical CO2 emissions from fossil fuel use, cement production, land use, land use change and forestry (LULUCF), during the period 1850-2024.
The approach mirrors the methodology used for Carbon Brief’s analysis of historical responsibility according to emissions within national borders, and when considering colonial rule.
Those articles explain how it is possible to confidently estimate emissions that took place more than 100 years ago, how the analysis deals with changes in national borders, how emissions from land use can be estimated and why the analysis only starts in 1850.
As those articles illustrated, there are many different lenses through which historical responsibility for climate change can be viewed, each offering an alternative viewpoint on the world.
The table below, which is sortable and searchable, shows a selection of the different ways that historical responsibility can be carved up.
It lists countries according to population, historical emissions within their own borders, emissions after accounting for colonial responsibility and the impact of CO2 embedded in trade since 1990.
The table also shows two alternative per capita metrics. The first shows cumulative territorial emissions for each country, divided by its population in 2024. The second shows per-capita territorial emissions in each year, cumulatively added up through to the present day.
(Note that the table excludes countries with a population of less than 1 million people.)
This data is free to use under the terms of Carbon Brief’s CC licence. The licence applies to non-commercial use and requires a credit to “Carbon Brief” and a link to this article.
The post Analysis: China’s emissions have now caused more global warming than EU appeared first on Carbon Brief.
Analysis: China’s emissions have now caused more global warming than EU
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
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”.
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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”
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.
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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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