The share of electricity in Great Britain generated from burning coal and gas fell to a record-low 2.4% earlier this month, Carbon Brief analysis shows.
The record low was reached at lunchtime on Monday 15 April and lasted for one hour. There have been a record 75 half-hour periods in 2024 to date when fossil fuels met less than 5% of demand.
There were only five such periods during the whole of 2022 – and just 16 last year.
The findings show that National Grid Electricity System Operator (NGESO) is closing in on its target of running the country’s electricity network without fossil fuels, for short periods, by 2025.
NGESO is “confident” this target will be met, its director of system operations tells Carbon Brief, adding that achieving the goal will be “absolutely groundbreaking and pretty much world leading”.
However, Carbon Brief’s analysis also illustrates some of the challenges to meeting the government’s target of a fully decarbonised electricity grid by 2035.
Fossil fuels fall
The island of Great Britain, comprising England, Scotland and Wales, has its own independent electricity system, which is managed at the transmission level by NGESO.
The transmission grid is effectively the motorway network for electricity.
It links large-scale electricity suppliers such as coal, gas and nuclear power plants to centres of demand, in towns and cities around the country.
Other companies run the low-voltage “distribution” networks, which take power from the transmission grid and distribute it to individual homes and businesses.
For most of its existence, this system had remained largely unchanged for decades. More recently, it has been in the midst of a rapid transformation as part of national efforts to reduce emissions.
In 2009, some 74% of GB electricity was coming from fossil fuels and only 2% was from renewables.
By 2023, there were several thousand large renewable sites dotted around the country, as well as nearly 1.5m small solar installations on the roofs of homes, offices and warehouses.
Only a third of GB electricity in 2023 came from fossil fuels – with 40% from renewables.
Yet these annual figures disguise even greater changes in the month-to-month, day-to-day, hour-to-hour and second-by-second operation of the electricity system.
The figure below shows the share of electricity in Great Britain being generated by fossil fuels in each half-hour period since 2009, including the record-low of 2.4% earlier this month.

The figure above shows how unprecedented it is for fossil fuels to be meeting such low shares of demand on the GB grid.
Indeed, the lowest half-hourly fossil fuel share in 2009 was 53% and, as recently as 2018, it had never dipped below 10%. The first half-hour period with less than 5% fossil fuels only came in 2022, when there were five such periods in total across the year.
During 2023, there were just 16 half-hour periods with less than 5% fossil fuels – the majority of which came during December of that year.
In contrast, there have already been 75 half-hours with less than 5% fossil fuels in 2024 to date.
The shift to ever lower fossil fuel use is illustrated in the figure below, which shows daily average shares starting to regularly drop below 10% in December 2023 and April 2024.

The daily average fossil fuel share fell to a record low of 6.4% on 5 April 2024, with the average on 15 April 2024 standing at 7.0%. Until 2022, the daily average had never been below 10%.
‘Zero-carbon operation’
Carbon Brief’s analysis shows that NGESO is closing in on the target, first set in 2019, of being able to operate the grid with “zero carbon”, for short periods, by 2025.
(NGESO defines this target as being able to run the GB transmission grid without fossil fuels. It bases its goal on a metric of 100% “zero-carbon operation”, meaning the share of demand, excluding imports, being met by renewables connected to the transmission grid or nuclear. It says this metric reached a peak of 90% during two half-hour periods in January and March 2023.)
The first-ever period of at least 30 minutes of “zero carbon operation” is most likely to come in autumn 2025, Craig Dyke, NGESO director of system operations tells Carbon Brief. “We’re confident that we will have the right capabilities on the system to be able to do that,” he adds.
Dyke says this moment will be “absolutely groundbreaking and pretty much world leading”, particularly given the size of the GB economy and the fact that, as an island, its grid is relatively isolated from neighbouring countries.
There have been two separate challenges in reaching this target. The first is having enough low-carbon electricity supplies to be able to cover demand during a given half-hour period.
The second challenge is having the technical capability to keep the grid stable without fossil fuels.
These technical requirements include maintaining the frequency of electricity supplies at close to 50Hz and responding to rapid changes in supply and demand through operational reserves.
NGESO also maintains the ability to restart the grid in the case of a total shutdown, sometimes referred to as “black start”, but now more formally called “restoration”.
Increases in wind and solar capacity mean low-carbon sources are now already sufficient to meet 100% of electricity demand in some periods. However, on the technical side, the 2025 target has been a “significant engineering challenge”, Dyke says:
“Getting to the 2025 ambition has been a significant engineering challenge, which we are solving.”
Grid services have, historically, been provided by fossil fuel power plants. Over the past five years, however, NGESO has been changing the way it procures these services, as well as reforming the rules of grid operation and the way it balances the grid in real time.
For example, through its “pathfinder” projects NGESO has contracted a series of sites that can offer grid services without fossil fuels. These include “synchronous condensers”, effectively giant spinning turbines that provide grid stability without burning fossil fuels.
Other key innovations include the use of batteries to manage the frequency of the grid and “grid forming inverters”, which use sophisticated power electronics to offer different types of grid support.
This development means renewable projects will be able to contribute grid stability services, such as “inertia”, that have traditionally only been offered by conventional fossil fuel generators.
Dyke tells Carbon Brief:
“This hasn’t just happened overnight. It’s been a culmination of a significant amount of effort over a number of years. That’s not just us [NGESO] operating in isolation, that’s planning and collaboration with industry, with [energy regulator] Ofgem and with the government…It’s not just about technologies, it’s about hearts and minds and processes and systems and people working together.”
Fully decarbonised grid
For NGESO, the 2025 goal is a stepping stone on the way to being able to run the grid at zero carbon constantly by 2035, in line with the government target of “fully decarbonised” electricity.
(The opposition Labour party is targeting a decarbonised grid by 2030. This target is seen as incredibly ambitious – and possibly even “unachievable” overall. A spokesperson for NGESO tells Carbon Brief: “Our previously published scenarios shows it is achievable – although challenging.”)
There are several further technical challenges to meeting this 2035 goal.
For example, the rise of variable wind and solar has expanded the ups and downs of fossil fuels in the mix, illustrated by the range between peaks and troughs in the first figure, above.
This is illustrated further in the simplified figure, below, by the increasing gap between the highest and lowest fossil fuel shares seen in each year (upper and lower blue lines, respectively).
The figure below also shows the annual average fossil fuel share of electricity (dashed line) falling from 74% in 2009 to 26% in 2024 to date. (The small increase in this annual average in 2022 was due to the GB grid exporting gas-fired power to France, where much of the nuclear fleet was offline.)

Notably, the maximum fossil fuel share in each half-hour period has declined more slowly than the average or minimum figures, falling from 88% in 2009 to 72% in 2023 and 66% in 2024 to date.
This reflects the fact that the GB grid still relies on gas-fired power stations being able to switch on when the wind is not blowing and the sun is not shining.
Crucially, the nation will need low-carbon alternatives to this gas capacity in order to reach the government’s target of a fully decarbonised grid by 2035.
These alternatives will need to operate across a range of different timescales, from seconds through to weeks and even years. For within-day timescales, this is likely to mean expanding energy storage capacity, principally with batteries, but also pumped hydro or compressed air.
For periods of weeks or seasons, the options include ongoing reliance on unabated gas – which would be incompatible with carbon targets – or the use of hydrogen turbines or gas plants that are coupled with carbon capture and storage (CCS).
The post Analysis: Fossil fuels fall to record-low 2.4% of British electricity appeared first on Carbon Brief.
Analysis: Fossil fuels fall to record-low 2.4% of British electricity
Climate Change
South Africa’s offshore oil push meets grassroots resistance in court
Layers of red dust coat South Africa’s Saldanha Bay, a legacy of the one billion-plus tonnes of iron ore exported from what was once a quiet coastal fishing town in the 1970s. Now the government wants to turn this area into the “oil and gas hub of South Africa”, but opposition from local communities and civil society could force a change of plan.
Since 2014 South Africa has developed a strategy for taking “full advantage” of its marine resources, known as Operation Phakisa. It has resulted in the mapping of more than 95% of the country’s nearly 3,000-kilometre coastline for offshore oil and gas exploration.
The plan seeks to “drill 30 exploration wells in 10 years”, which it estimates could lead to the production of an average of 370,000 barrels of oil and gas per day over 20 years, with Saldanha Bay earmarked as a key logistics hub. It also aims to develop other marine sectors like aquaculture, maritime transport and ocean tourism.
However, two major court cases against the government and oil giants Shell and TotalEnergies have challenged those plans, as coastal residents, allied with national civil society groups, have pushed back against oil concessions held by the multinationals, arguing they were not consulted, and that towns like Saldanha Bay could face social and environmental harms from the fossil fuel extraction.
Melissa Groenink-Groves, programme manager at legal nonprofit Natural Justice, said the cases in South Africa could set a precedent for the whole region. “When communities win in the courts, the successes serve as inspiration for other communities to advocate [for] their rights in their own contexts,” she explained.
She added that the legal challenges to Operation Phakisa also develop climate litigation in the African context, and could impact how environmental impact assessments are conducted going forward.
Globally, as the oil and gas industry sets its sights on the ocean, with over 85% of new discoveries in 2024 made offshore, scientists and activists warn it could threaten marine life and coastal communities, and weaken the ocean’s ability to trap excess heat from the atmosphere, fuelling planetary warming further.

Taking oil companies to court
About 300 kilometres north of Saldanha Bay, the Aukotowa Fisheries Cooperative, backed by nonprofits The Green Connection and Natural Justice, has taken TotalEnergies to court over its plans to drill for oil and gas in a 30,000-square-kilometre block off South Africa’s west coast.
The oil exploration block is in a biodiverse marine area bordering Namibia and South Africa known as the Orange Basin, which is a “highly relevant” sanctuary for endangered species, according to Nelson Mandela University’s Institute for Coastal and Marine Research.
Among other grievances, the cooperative maintains that the company’s environmental impact assessment was flawed, failing to consider the project’s contribution to climate change, and that the government “placed the profits of a multinational corporation above the livelihoods of vulnerable coastal communities”. The Western Cape High Court concluded hearings in late March and is expected to deliver a ruling later this year.
Walter Steenkamp, chairperson of the Aukotowa Cooperative, is concerned that the oil and gas drilling will lead to increased inequality, asking “for whom is the development? Definitely not for us.”
In a written statement, TotalEnergies told Climate Home News that it “is a responsible operator fully committed to complying with all applicable South African legislation”.
Southeast Asia’s fragile grids threaten billions in clean energy investment
Communities and climate impacts at stake
On the other side of the country, along South Africa’s eastern coastline, community-based nonprofit Sustaining the Wild Coast and partner organisations challenged Shell and Impact Africa’s exploration permit, arguing that the firms had failed to consult impacted communities – a legal requirement under South African law.
Co-plaintiff Sinegugu Zukulu also said in 2022 that “oil and gas will lead to more emissions, and in the face of climate change, this is wholly irresponsible”.
Following two rulings against the companies by lower courts, the case is now before South Africa’s highest Constitutional Court, which has reserved judgment since September 2025. A ruling against the companies would be final, effectively ending the exploration permit.
Legal expert Groenink-Groves said oil exploration applications under Operation Phakisa have been “granted largely without properly assessing the devastating impact an oil spill could have on small-scale fishers, the risks of drilling in ultra-deep waters, [and] without accounting for climate change impacts associated with oil and gas exploitation”.
She added that exploration applications have often failed to consider coastal management laws and in some cases, cross-border and regional environmental risks.
Shell and South Africa’s Department of Mineral and Petroleum Resources did not respond to written requests for comment.

South Africa’s offshore oil ambitions
Fishers around South Africa, many of whom have for generations relied on marine resources for survival, say the country’s offshore oil and gas push is sacrificing their livelihoods for profit.
“Why do they want to destroy our heritage? We can’t afford to say yes to oil and gas because the ocean is our source of life,” said Carmelita Mostert, a member of advocacy group Coastal Links and third-generation Saldanha Bay fisher.
Yet with unemployment above 30%, alongside high levels of poverty and wealth inequality, the government sees Operation Phakisa as a vehicle for socioeconomic development.
South Africa’s Minister of Mineral and Petroleum Resources Gwede Mantashe has described the court cases as “anti-development”, and claimed that the environmental organisations are funded by the CIA.
Sifiso Dladla, a campaigner with human rights organisation groundWork, argued that the close relationship between the government and the fossil fuel industry – including its 3% contribution to gross tax revenue – limits the potential success of movements pushing for an inclusive energy system. Politicians “need money to win elections. Mining companies need the government to protect them,” he said.
Patrick Bond, a political economist and sociology professor at the University of Johannesburg, said Operation Phakisa only makes economic sense if its social and environmental harms are ignored, adding that “if a genuine social cost of carbon analysis were done in any African fossil fuel project, there would be few – if any – able to justify the projects economically”.
At a global scale, Bond said oil multinationals have the financial backing of European governments – including France’s $2.8 billion stake in TotalEnergies – which can help make local resistance more effective where it has international allies to amplify the messages.
For Saldanha Bay fisher Mostert, the fight is about protecting the livelihoods of coastal communities. “It is my hope that we can stand strong and protest,” she said. “If oil and gas is not allowed, our lives will be much easier and better – but if oil and gas goes ahead we will be in absolute agony.”
The post South Africa’s offshore oil push meets grassroots resistance in court appeared first on Climate Home News.
South Africa’s offshore oil push meets grassroots resistance in court
Climate Change
Millions of kilograms of marine life taken from Australia’s marine protected areas every year, FOI finds
SYDNEY, Tuesday 11 August 2026 — New data obtained by Greenpeace Australia Pacific has found millions of kilograms of marine life are being taken from Australian marine parks by commercial fishers annually, as the government begins its review of the country’s Marine Parks Network.
The data, released to Greenpeace in response to a Freedom of Information request, relates to 18 of Australia’s 60 Commonwealth marine parks, and shows almost 2.2 million kg of marine life is being fished each year, raising concerns about the true catch numbers across all marine protected areas.
Greenpeace is calling for the Labor government to use the once-in-a-decade Marine Parks Network review, announced last fortnight, to ban industrial activities, including bottom trawling, longlining and oil and gas mining, from Australia’s Marine Parks Network, and increase fully-protected ocean sanctuaries within the network.
Elle Lawless, Senior Campaigner at Greenpeace Australia Pacific, said:
“It’s chilling to think of the true scale of destruction happening inside all of Australia’s marine parks, and how much of our precious ocean wildlife, like dolphins, turtles or seabirds, could be pulled out of protected areas as bycatch.
“We’re talking about 6,600 kilograms of wildlife in one day, and that does not include what’s caught in the other 42 marine parks, many of which allow destructive fishing like longlining.
“Australia has made significant progress in securing 52% of its oceans in marine parks; however, this intent is undermined by zones that allow damaging industrial fishing activities, such as bottom trawling and longlining. The review of Australia’s Marine Parks Network is a critical opportunity to fix what isn’t working and finally give our oceans the real protection they deserve.
You wouldn’t expect someone to bulldoze a national park on land, so why should they be allowed to trawl in a marine park?”
“Greenpeace Australia Pacific welcomes the Albanese Government’s review of the Commonwealth Marine Parks Network as a rare opportunity to strengthen our marine parks and ban industrial fishing in Australia’s marine protected areas.”
The documents reveal that the south-west network has the largest catch volume, at 887,160kg per year, followed by the Coral Sea network, which extends out from the Great Barrier Reef, losing significant wildlife at 808,840kg annually.
—ENDS—
Notes:
- More than half of Australia’s Marine Parks Network allow extractive industries, including industrial fishing and oil and gas mining.
- The data, supplied by the Department of Agriculture, Fisheries and Forestry, does not specify how much of the catch is fish or bycatch, like non-target fish, turtles or seabirds, and is available on request.
- Read Greenpeace’s new report: Trawling the Bottom Line
Climate Change
Marine Parks Explained
Australia’s network of marine parks is the largest in the world, covering more than half (52%) of Australia’s Commonwealth waters. You could be forgiven for assuming that a marine park is much like a national park on land: a highly protected place where people can enjoy nature while conservation efforts help habitats recover and wildlife thrive. You wouldn’t expect someone to bulldoze a national park, so why should they be allowed to bottom trawl in a marine park?
The reality is that not all marine parks are equally protected. Australia’s Marine Parks Network is divided into different zoning categories, with each zone determining which activities are permitted and the level of protection provided.
More than half of the Commonwealth Marine Parks Network allows industrial activities like oil and gas mining, and industrial fishing.
Our survival, and the survival of our planet, depends on the ocean. The ocean produces more oxygen than all of our forests combined, sustains communities and regulates the earth’s temperature. It’s home to wondrous wildlife and important ecosystems like coral reefs and kelp forests.
We love our big blue backyard
Australia’s ocean is teeming with life that is found nowhere else on earth. Schools of colourful fish, vibrant coral reefs, endemic shark nurseries, pods of dolphins, families of whales, playful seal pups and threatened Jurassic-era turtles call Australian waters home.
Since time began, from the turquoise waves to the deep blue, the ocean has connected our shorelines and communities, fed us, guided us and grounded us. We are intrinsically connected to our big blue backyard – more than 85% of us live within 50km of the shoreline. For tens of thousands of years, people have lived in harmony with the ocean and the wildlife within it, caring for and being sustained by its rich waters. Australia’s waters are some of the most unique and abundant places on Earth but our Marine Parks Network is falling short to properly protect them.
Australia’s marine parks aren’t living up to their name

The Australian Commonwealth Marine Parks Network covers commonwealth waters 5.5km from the coast. The network is divided into 7 regional management areas, overall the network contains 60 marine parks. Zoning types determine what activities are allowed in each area. Over half of the network allows industrial activities, risking our most precious and threatened ocean wildlife.
Within many of our marine parks, destructive industries are allowed to fish, trawl, dig and mine using barbaric and cruel methods. Here are some of the zones explained:
- Bottom Trawling: Special Purpose (trawl) zones allow bottom trawling. This covers 10 marine parks totalling almost 13 million hectares. Bottom trawlers bulldoze the seafloor with weighted nets, deforesting our underwater forests; a cruel, indiscriminate and inefficient way to fish.
- Other Industrial Fishing: Includes “Habitat Protection Zones, ““Multi Use Zones” and “Special Purpose Zones.” Fishing methods vary from park to park but many marine parks in these zones allow industrial fishing like longlining. Longlining involves setting lines that can be 100km long, bristling with deadly hooks designed to catch a specific fish species. But longlining is not a selective method of fishing – significant numbers of sharks, rays, turtles, dolphins and seabirds can be harmed or killed as bycatch in the process.
- Oil and Gas Mining: Many “Special Purpose” and “Multi Use” zones allow seismic blasting and oil and gas mining. 30 marine parks or 65 million hectares of Australia’s highest conservation value areas for ocean wildlife are open for mining and exploration of oil and gas.
- Ocean Sanctuaries: National Park and Sanctuary zones are fully and highly protected marine parks designed to conserve wildlife and their habitat, where fishing, mining, and other industrial activities are not allowed.
Industrial fishing is one of the biggest threats to the ocean

In May, Greenpeace Australia Pacific sailed our campaigning vessel Oceania through some of Australia’s most beautiful and threatened marine parks. Our crew visited Jervis and Hunter marine parks to document their beauty, showcase what’s at risk and aim to expose the industrial fishing activities in these protected waters. Both of these marine parks allow bottom trawling and longlining methods of industrial fishing.
Industrial fishing is ripping the ocean apart across the planet. Longlining, also known as longline fishing, is an industrial fishing method that involves the use of a fishing line with thousands of baited hooks. These fishing lines can stretch over 100 kilometers in length and are set to capture a fish species, often tuna or billfish species. But it is not a selective method of fishing and often results in significant bycatch. This includes a range of non-target species like sharks, rays, sea turtles, marine mammals, and seabirds which are often injured or killed as bycatch.
Bottom trawling involves dragging heavy weighted nets along the ocean floor. This fishing method is popular with commercial fishing companies, because it makes it easy to catch large quantities of fish in one go. But it also damages the seafloor, releasing carbon and can kill or injure non-target ocean life like coral, fur seals, dolphins and seabirds. You may have watched the reality of bottom trawling (and the benefits of ocean sanctuaries) in Ocean with David Attenborough, if not, add it to your watch list!
Fully protected ocean sanctuaries that ban industrial fishing and mining can protect ocean wildlife and underwater wonderlands for generations to come. Vast, robust sanctuaries create blue havens where ocean wildlife are safe from nets and hooks, and can truly rest, recover, thrive and replenish out into the surrounding waters. Ocean sanctuaries ensure a healthy ocean full of life.
A once-in-a-decade chance to fix what’s falling short
We have a unique opportunity to turn the tide.
The Australian Government is asking for your feedback on how our Commonwealth Marine Parks Network is managed. This is our once-in-a-decade chance to protect ocean wildlife, ban industrial fishing and create more ocean sanctuaries.
As part of the review the Government is asking for submissions from the public to hear from you on what improvements are needed to better protect our vast network of marine parks. Writing a submission is a powerful way to influence government decisions and create real change.
This is the moment to ban industrial activities like bottom trawling and oil and gas mining. But only if they hear from YOU. Add your name!
Greenpeace is calling on the Australian government to:
1. Ban industrial activities from Australia’s Marine Parks Network: Ban industrial activities, such as industrial fishing, seismic blasting and oil and gas mining, from Australia’s marine parks.
2. Create more ocean sanctuaries: Increase fully protected sanctuaries in Australia’s marine parks based on science principles.
3. Connect Australia’s Marine Parks Network to the High Seas: mCreate seascape connectivity by linking Australian marine parks to new high seas ocean sanctuaries.
References
Substantiation that more than half of the Marine Parks Network permits industrial activity comes from a peer-reviewed systematic literature review (Phillips et al. 2025, PLOS One, https://doi.org/10.1371/journal.pone.0307324). The study found that within the Commonwealth Marine Parks Network specifically, “all zones are considered partially protected areas, meaning areas where extractive activities are permitted, except ‘Pink zones’ (Preservation Zones; IUCN Ia) and ‘Green Zones’ (IUCN II).” In other words, every Commonwealth marine park zone type other than the network’s strict no-take sanctuary and national park zones (IUCN Ia and II) permits some form of extractive industrial activity. Since no-take zones are the minority zone type across the network by area, this supports the conclusion that the majority of the network’s area is zoned to permit industrial activity.
DCCEEW Australian Marine Parks spatial dataset (https://fed.dcceew.gov.au/datasets/erin::australian-marine-parks/explore), filtered by zone type. This confirms that 38.43% of the network’s area is zoned as Sanctuary or National Park zones (IUCN Ia and II). These are the no-take categories excluded from the peer-reviewed study’s definition of partially protected/industrial-permitting zones. The remaining 61.57% of the network falls within the zone categories the study classifies as permitting industrial activity (per The MPA Guide definition of “industrial” applied in Phillips et al. 2025), directly corroborating the peer-reviewed finding with current Commonwealth-specific spatial data.
For further information on activities permitted within the Marine Parks Network Zoning, you can refer to the Management Plans zoning and rules for each Marine Parks Network area, for example: Temperate East, Coral Sea, North.
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