Welcome to Carbon Brief’s DeBriefed.
An essential guide to the week’s key developments relating to climate change.
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This week
Hottest year on record
RISING TEMPERATURES: There is a greater than 99% chance that 2023 will be the hottest year on record, according to new Carbon Brief analysis. The analysis combined multiple temperature datasets to conclude it is “virtually certain” that this year will be the hottest for millennia. After a cooler start to the year, the past four months have seen truly exceptional global temperatures, surpassing prior monthly records by large margins, according to the analysis.
MYSTERY HEAT: Dr Gavin Schmidt, director of the NASA Goddard Institute for Space Studies, told the Washington Post that “it is indeed hard to give a good and informed answer to why this is happening – possibly for the first time”. Dr Zeke Hausfather, Carbon Brief’s climate science contributor who undertook the analysis, wrote in the New York Times that the ”acceleration” in warming “means that the effects of climate change we are already seeing – extreme heatwaves, wildfires, rainfall and sea level rise – will only grow more severe in the coming years”.
Fossil fuels under fire
ONE VOICE: The European Union has agreed to push for the “phase out” of all fossil fuels at the upcoming COP28 climate summit in Dubai in late November, Reuters reported. This could set up the bloc “to be one of the most ambitious negotiators” at the summit, according to the newswire.
FIGHTS FUELLED: Climate Home News reported that “negotiators from Africa and India have set out separate plans to push developed countries to do more to move away from fossil fuels” at the summit. Meanwhile, Axios reported that the host of the talks, UAE’s Sultan Al Jaber, has called for “a responsible phasedown of unabated fossil fuels”.
LOSS AND DAMAGE: Elsewhere, the Financial Times reported that countries are at odds over how to run the “loss and damage” fund agreed at the COP27 climate summit in Egypt last year, which was widely viewed as a historic step forward for climate justice. According to the FT, representatives from the negotiating bloc of G77 nations plus China, a large coalition of developing countries, were “considering abandoning” discussions underway in Aswan in Egypt amid a push from the US to allow the World Bank to be in charge of the fund.
Around the world
- BRAZIL DROUGHT: The Amazon river’s water level fell to its lowest in more than a century, leaving boats stranded and cutting off food and water supplies to remote villages, CNN reported.
- GREEN BELT: According to Xinhua, Chinese president Xi Jinping said the country will double down on green development “as one of the major steps to support the joint pursuit of high-quality belt and road cooperation”. (The belt and road initiative is China’s major infrastructure venture involving many developing nations across Asia and Africa.)
- UK HEAT: The UK’s National Infrastructure Commission has urged the government to phase out gas boilers and spend billions on rolling out heat pumps, the Daily Telegraph reported.
- CLIMATE STALEMATE: Russia’s opposition to holding the COP29 climate summit in an EU nation in eastern Europe next year has “left nations scrambling to find an alternative in time to organise the massive global event”, Reuters reported.
- OIL AND GAS DASH: The secretary general of the Organization of the Petroleum Exporting Countries (OPEC), Haitham Al Ghais, said Africa should be allowed to use its oil and gas to fight energy poverty, “a position often repeated by the fossil fuel industry to increase oil production on the continent”, Reuters reported.
£492bn
How much global investment in electricity grids is needed annually by 2030, if national climate targets and reliable power supplies are to be achieved, according to a new report from the International Energy Agency (IEA) covered by the Guardian.
Latest climate research
- The world may have reached a “global irreversible solar tipping point”, where solar energy gradually comes to dominate global electricity markets – even without any further climate policies, a new paper in Nature Communication suggested.
- A new analysis in Climate Policy discussed ways to better integrate the perspectives of livestock keepers in Kenya, Ethiopia and Uganda in indicators for tracking climate adaptation, which tend to be limited to government documents only.
- Limiting global warming to 2C above pre-industrial levels would leave the Asia-Pacific, Europe and the US “highly exposed to “stranded assets”, especially coal plants”, a new paper in Nature Communication found.
(For more, see Carbon Brief’s in-depth daily summaries of the top climate news stories on Monday, Tuesday, Wednesday, Thursday and Friday.)
Captured
Toxic algae on UK’s largest lake
Lough Neagh – a lake in Northern Ireland that is larger than the country of Malta – has been plagued by blue-green algae that can negatively impact humans, plants and animals. The image above shows the blooms visible from Copernicus satellite imagery on 4 September. The green swirls of algae are particularly noticeable on the eastern side of the lake. Scientists told Carbon Brief that agricultural nutrient runoff and climate change are the main roots of the problem – and that there is no “silver-bullet” solution.
Spotlight
A young activist’s campaign to save Africa’s vanishing Lake Chad
This week, Carbon Brief speaks to young Nigerian climate activist Adenike Oladosu about her work to raise awareness about the rapid disappearance of Lake Chad.
The discussion of climate change is not a priority in many African countries, but it is driving some of the most striking upheavals across the continent. One example is the shrinking Lake Chad, which has been linked to conflict and migration in the Sahel. Once the world’s sixth-largest lake, it has shrunk by around 90% since the 1960s.
Adenike Oladosu learned about Lake Chad’s precarious state while researching herdsmen-farmers conflicts as a university student in Nigeria’s middle-belt region. She was surprised that an issue usually framed as an ethnic war was essentially a fight for depleting resources.
Inspired by the likes of Swedish activist Greta Thunberg, Oladosu decided to begin a Fridays for Future climate strike in Abuja, Nigeria’s political capital. She printed climate signs and stood alone at busy intersections; she also went to schools and churches. Soon, other young people joined her.
“The world needs to know about Lake Chad, because it doesn’t affect Nigeria alone, it affects the country around, including Niger, Chad and Cameroon,” Oladosu said. “My understanding is the fact that if you don’t know that a problem exists, you can’t solve it. Understanding that a problem exists is the first step towards solving the problem itself.”
On Twitter, Oladosu is relentless about campaigning for the restoration of Lake Chad. And she believes awareness about the issue is growing. In November 2022, on the campaign trail, Nigerian president Bola Tinubu promised to “recharge” the lake.
Earlier this year, as a fellow of the “planetary scholar and artists in residence” programme at the Justus Liebig University in Germany, Oladosu used remote-sensing technologies to observe and present the lake as a threatened space, raising more awareness about “the planetary dimensions of the crisis.”
For Oladosu, the shrinking of Lake Chad is also an issue of climate justice, which is connected to human rights. As of August 2023, more than six million people were living as displaced persons in the Chad basin, according to the UN. If Lake Chad was in Germany, she questioned, would it have shrunk by 90%?
Ahead of COP28, Oladosu joined the ONE campaign team in October to lobby for African priorities at the EU parliament in Brussels. For her, the restoration of Lake Chad should be one of the issues to take centre stage at the climate summit. She told Carbon Brief:
“If Lake Chad dries out it could become a battlefield for terrorists. If we want to achieve peace and security in the region, recharge Lake Chad in order to strengthen the livelihood in the region. This could be done through climate finance. Also, Lake Chad isn’t just an economic issue, it is a cultural site that unites. This is a decade of ecosystem restoration, Lake Chad should not be left behind.”
Watch, read, listen
CLIMATE WRECK: On the podcast Inherited, storyteller Mo Isu traced the repetitive cycle of loss and rebuilding in the rural Niger Delta region of Nigeria as the country weathers extreme seasonal flooding.
LOOKING BACK: Grist examined the historical link between environmental disasters and societal collapse.
GREENWASHING: The New Yorker reported on how a major carbon offsets firm sold millions of credits for carbon reductions that “weren’t real”.
Coming up
- 22 October: Argentina general election
- 23-27 October: Latin America and the Caribbean Climate Week 2023, Panama City, Panama
- 24 October: IEA’s World Energy Outlook 2023
Pick of the jobs
- Climate Home News, editor | Salary: £50,000-70,000. Location: Remote
- China Dialogue Trust, regional social media editor (Africa) | Salary: $580 per month. Location: Africa
- Diocese of Norwich, net-zero carbon officer | Salary: £35,000-£40,000. Location: Norwich, Norfolk
DeBriefed is edited by Daisy Dunne. Please send any tips or feedback to debriefed@carbonbrief.org
The post DeBriefed 20 October 2023: Earth’s hottest year ‘for millennia’; Countries set out stall on fossil fuels; Saving shrinking Lake Chad appeared first on Carbon Brief.
Climate Change
North Carolina Regulators Nix $1.2 Billion Federal Proposal to Dredge Wilmington Harbor
U.S. Army Corps of Engineers failed to explain how it would mitigate environmental harms, including PFAS contamination.
The U.S. Army Corps of Engineers can’t dredge 28 miles of the Wilmington Harbor as planned, after North Carolina environmental regulators determined the billion-dollar proposal would be inconsistent with the state’s coastal management policies.
North Carolina Regulators Nix $1.2 Billion Federal Proposal to Dredge Wilmington Harbor
Australia has some of the largest areas of high volume, consistent solar and wind energy anywhere in the world. It is a natural advantage that many countries in our region and across Europe will envy as they ramp up their efforts to reduce carbon pollution.
Australia has an amazing opportunity to utilise this abundance of reliable energy not only to transform our own energy systems but also that of our neighbours – if we get the policy settings right.
We are, in fact, already seeing the benefits of renewable energy flowing into our electricity grids. With all the inflation pressures on our bank accounts it looks like electricity pricing may be one cost that could be turning a corner – largely thanks to cheap solar and wind energy.
Renewables are Bringing Down the Cost of Producing Electricity
Here at Greenpeace, while we think there are some important questions to ask about renewable energy, it is clear that solar and wind are certainly the cheapest energy options available.
In contrast, coal, oil and gas are not only big on pollution, they are also proving costlier as they struggle to cope with the changing nature of our electricity systems. Plus, fossil fuels are much more exposed to international price fluctuations – as we all experienced when our electricity bills rapidly rose following the Russian invasion of Ukraine.
Wouldn’t it be great if we instead had energy independence, sourced from an infinite supply of clean energy?
Solar and wind (backed by batteries) can do just that and the reality is that they are already out-competing the old guard of gas and coal simply because they are quicker and cheaper to deploy. Which is good news for electricity prices!
Although whether energy retailers are passing on those savings to customers is another question. Short answer: no, they’re not – but it is a bit complex.
Why are my electricity bills still high?
There are a number of elements that make up the final amount we see on our bills. The graph below shows the breakdown of energy costs covered by our bills.
You will see roughly a third (36.2% in 2025-26) of the cost goes to maintenance and build out of the electricity grid. This includes the transmission lines needed to connect to new renewable energy sites and to connect states so they can better share their energy resources. The ‘network’ costs have been increasing but so have other components of our bill, most notably the ‘wholesale’ cost of producing electricity.
Thankfully, the cost of producing the electricity is now starting to go down (thanks to renewables and batteries), but they are coming off record highs thanks to the exorbitant cost of gas and the unreliability of coal power stations that are old and no longer fit for purpose.
During high demand times (eg, when we all get home from work on a hot day and turn on the air conditioning) spot prices can quickly jump. Add to that a couple of coal power plants breaking down (as they increasingly do), and expensive gas fired power use spikes in the system. This can quickly cancel out any of the cost savings solar power may have created during the day when prices can actually go negative.
The good news is that this is exactly the problem batteries can solve. Batteries are great at soaking up the surplus supply of solar during the middle of the day, which creates a more efficient system, and then rapidly pumping out that power during the evening peak at a cheaper rate than gas.
How much have costs come down?
According to the Australian energy regulator (AEMO), wholesale electricity prices across the east coast have dropped by 44% when comparing prices in quarter 4 of 2025 to the same period in 2024.
AEMO directly attributes the change to the significant growth in wind (up 29%), solar (up 15%), and batteries (3,796 MW of new battery capacity added). This influx of cheap renewable energy has seen a corresponding decrease in the use of polluting fossil fuels to power the grid. Coal fired power dropped by 4.6% and gas fired power fell by a staggering 27%.
The same trend can be seen in the world’s largest standalone grid in WA where renewable energy and storage supplied a record 52.4% of the grid’s energy across the final 3 months of 2025. That is an impressive result given there is no interstate connection to borrow energy from and there is no hydroelectric power in the system.
As a result, WA has seen a 13% drop in wholesale electricity prices thanks to a 5.8% reduction in coal fired power and a 16.4% reduction in gas fired power.
Australian Households Lead the Way on Solar and Batteries
Despite all the attempts to discredit clean energy by Trump and other conservative politicians, Aussie households have long known the value of renewable energy. In fact, Australia now holds the title for the highest rate of solar energy per capita in the world.
This is now being followed by the rapid takeup of household batteries with the Clean Energy Regulator being overwhelmed with interest in the Cheaper Home Batteries Program. They now expect to receive “around 175,000 valid battery applications corresponding to a total usable capacity of 3.9 GWh by the end of 2025.”’
All these extra batteries storing the surplus solar energy across our neighbourhoods during the day is not only creating drastic bill reductions for those households who are installing them, it is helping the whole grid. Which eventually will help everyone’s electricity bills.
If Australia as a whole follows the lead of suburban families by switching to cheap solar (plus wind) backed-up by batteries, it has an unparalleled opportunity to build its economy on the back of unlimited, local, clean energy harnessed from the sun and wind.
Powering our Future Economy
If there was ever something Australia has a natural advantage in, its sun and wind. But given the growing demand for electricity from data centres and the electrification of heavy industry, we are going to need more than just rooftop solar panels.
That’s where Australia has the potential, more than almost any other country, to become a renewable energy powerhouse and punch above our weight in the fight against climate change. See for example the unique opportunity to enter into the production and export of green iron.
While there is still quite a way to go before our electricity is fully sourced from solar and wind, we are well on the way. The clean energy charge is gathering pace – and our communities, oceans, wildlife and bank balances will be the better for it.
Climate Change
Whale Entanglements in Fishing Gear Surge Off U.S. West Coast During Marine Heatwaves
New research finds that rising ocean temperatures are shrinking cool-water feeding grounds, pushing humpbacks into gear-heavy waters near shore. Scientists say ocean forecasting tool could help fisheries reduce the risk.
Each spring, humpback whales start to feed off the coast of California and Oregon on dense schools of anchovies, sardines and krill—prey sustained by cool, nutrient-rich water that seasonal winds draw up from the deep ocean.
Whale Entanglements in Fishing Gear Surge Off U.S. West Coast During Marine Heatwaves
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