Plants’ secret second roots rewrite the climate playbook | ScienceDaily
https://www.sciencedaily.com/releases/2025/06/250620231806.htm

Beneath the forest floor lies an overlooked secret: many plants grow a second set of roots far deeper than expected sometimes over three feet down tapping into hidden nutrient stores and potentially locking away carbon. A new study using deep-soil data from NEON reveals that these "bimodal" rooting systems are more common than previously believed and may play a powerful role in stabilizing ecosystems and fighting climate change

World faces new danger of ‘economic denial’ in climate fight, Cop30 head says | Cop30 | The Guardian
https://www.theguardian.com/environment/2025/may/28/andre-correa-do-lago-cop30-interview-climate-crisis

The world is facing a new form of climate denial – not the dismissal of climate science, but a concerted attack on the idea that the economy can be reorganised to fight the crisis, the president of global climate talks has warned.

André Corrêa do Lago, the veteran Brazilian diplomat who will direct this year’s UN summit, Cop30, believes his biggest job will be to counter the attempt from some vested interests to prevent climate policies aimed at shifting the global economy to a low-carbon footing.

“There is a new kind of opposition to climate action. We are facing a discredit of climate policies. I don’t think we are facing climate denial,” he said, referring to the increasingly desperate attempts to pretend there is no consensus on climate science that have plagued climate action for the past 30 years. “It’s not a scientific denial, it’s an economic denial.”

This economic denial could be just as dangerous and cause as much delay as repeated attempts to deny climate science in previous years, he warned in an exclusive interview with the Guardian.

Záchrana planety je tu? Izraelci umí odstát tunu CO2 za 70 dolarů - Seznam Zprávy
https://www.seznamzpravy.cz/clanek/tech-technologie-zachrana-planety-je-tu-izraelci-umi-odstat-tunu-co2-za-70-dolaru-276873

Levnější řešení k odstraňování skleníkového plynu, který přispívá k oteplování, a tak i klimatické změně, představil izraelský startup RepAir Carbon. Odstranit jednu tunu uhlíku z atmosféry by s ní mělo vyjít na 70 až 80 dolarů, zatímco u známějších firem jako Climeworks ze Švýcarska anebo Carbon Engineering z Kanady to je okolo 600 dolarů za tunu.

„Ta technologie je opravdu novější ve srovnání s procesy záchytů, které se objevily v 90. letech nebo i před 10 lety. Trik je v tom, že abychom mohli zachytit oxid uhličitý, tak potřebujeme zásaditý roztok. Ty předchozí technologie fungují tak, že hydroxidové ionty v roztoku jsme museli přidávat, kdežto v této technologii se ionty generují pomocí katodické redukce,“ uvádí pro SZ Tech v úvodní videoreportáži Eva Pluhařová z Ústavu fyzikální chemie Jaroslava Heyrovského, která se zachytáváním a přeměnou oxidu uhličitého na užitečné suroviny také zabývá.
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Tím, že tato vylepšená technologie nepoužívá energii pro ohřev rozpouštědla, ale na katodickou redukci a proces v ní probíhá setrvale, tak spotřebuje o 70 procent méně energie než dosavadní zařízení. A s cenou od 70 do 80 dolarů za jednu zachycenou tunu uhlíku se dostává až na cenovou úroveň emisní povolenky, která letos v Evropské unii v průměru vychází na 72 eur za tunu.
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Izraelský startup RepAir Carbon, který vznikl teprve v roce 2020 a investoři dosud na jeho vývoj dali 29,5 milionu dolarů, chce svou vyvíjenou technologii instalovat nejdřív příští rok v Řecku, kde plánuje odčerpávat 100 tisíc tun uhlíku z ovzduší za rok. A na stejnou kapacitu chce dojít také ve Francii a na poloviční také v Africe - tam ještě ale neuvedl, kdy je instaluje.

Nakonec bude Cina svetovym leadrem v dekarbonizaci. Kdo by to pred par lety rekl...

China's CO2 emissions have started falling – is this finally the peak? | New Scientist
https://www.newscientist.com/article/2480289-chinas-co2-emissions-have-started-falling-is-this-finally-the-peak/

China, the world’s largest emitter of carbon dioxide, has seen a slight decline in those emissions over the past twelve months, even as demand for power has gone up. This is an encouraging sign the country’s massive buildout of clean energy has begun to displace fossil fuels – but emissions could still surge again.

That is according to an analysis of China’s economic and energy data by Lauri Myllivirta at the Centre for Research on Energy and Clean Air, a research organisation in Finland. According to the report, published in Carbon Brief, China’s CO2 emissions have declined by 1 per cent over the past 12 months; in the first quarter of 2025 alone emissions declined by 1.6 per cent relative to last year.
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This isn’t the first time China’s CO2 emissions have dipped. For instance, they dropped in 2022 as the economy came to a standstill during covid-19 lockdowns. But this is the first time emissions have fallen even as the country has used more power. “That, of course, means the current fall in emissions has a much better chance of being sustained,” says Myllivirta.

This is mainly a consequence of China’s record build-out of solar, wind and nuclear power, which is beginning to eat into the total electricity generated by burning fossil fuels. Wider economic shifts away from cement and steel production, which are carbon-intensive industries, have also contributed to the decline. Another factor is the jump in the share of people driving electric vehicles, which has cut into the demand for oil.

If China maintains these trends, its carbon emissions could continue to fall. A sustained drop would indicate the country has passed peak emissions, putting it several years ahead of its 2030 target. The achievement would represent a substantial physical and psychological milestone for efforts to tackle climate change, says Myllivirta.

In March (2025?), 440 winter and summer Olympians representing more than 90 countries and 50 sports wroteExternal link an open letter to candidates for the presidency of the International Olympic Committee. They expressed concern about the risks that climate change poses to many sports and called for the organisation to take more action to fight climate change. This included setting standards for sponsorships, upholding sustainable practices, and strengthening commitments to cut carbon emissions.

Trump targets California climate laws in new executive order - CalMatters
https://calmatters.org/environment/climate-change/2025/04/trump-order-california-climate-laws/

Trump’s order singles out California’s cap and trade program, a market-based system created in 2012 that is considered one of the state’s key policies for combating climate change. The program sets limits on greenhouse gas emissions and allows companies to buy and sell credits. Twelve other states have similar trade programs for cutting greenhouse gases.

“California, for example, punishes carbon use by adopting impossible caps on the amount of carbon businesses may use, all but forcing businesses to pay large sums to ‘trade’ carbon credits to meet California’s radical requirements,” Trump’s order says.

Living carbon sinks - rip

Scientists unsure why gray whales are dying off Pacific Coast again - Los Angeles Times
https://www.latimes.com/science/story/2025-04-08/gray-whales-are-dying-off-the-pacific-coast-again-and-scientists-arent-sure-why

At least 70 whales have perished since the start of the year in the shallow lagoons of Mexico’s Baja California peninsula where the animals gather to calf, nurse and breed.

Three gray whales have died in San Francisco Bay recently during their migration north, with one showing signs of malnourishment.

PALEONTOLOG: ale ty neelektrolyzuješ sůl, ale vodný roztok, ve kterém je sůl stejně disociovaná na ionty. že se jim z toho uvolňuje jako vedlejší efekt vodík, to je pravda - je to další kladný iont, akorát se neusazuje v pevné formě, ale uniká. Asi už jsme v tématu klubu #offtopic, obecně je to stejný efekt, se kterým se počítalo i na pasivní carbon capture - tedy že vysypou nějaký štěrk o správném složení na pláže moří.

Víceméně mám info, poté, co jsem tuhle otázku nastolil jinde, že v té mořské vodě, ze které odebereme kladné ionty vápníku a hořčíku, pak chlor vytvoří v podstatě velmi slabý roztok HCl: sníží se pH mořské vody a ta bude mít větší tendenci si ty chybějící kladné ionty vyžrat ze všech možných hornin břehu a dna a ustavit tak opět rovnováhu složení solí ve vodě a neutrální pH. Takže de-facto se ten materiál netěží z mořské vody jako takové, ale prostřednictvím vody se těží dno a břeh... akorát atom a po atomu a jaksi dodatečně :-) Asi když to dělají i koráli, taky dost ve velkým, tak s tím moře nějak počítá...

TADEAS:

Factcheck: Kemi Badenoch’s claim that net zero is ‘impossible’ by 2050 | Kemi Badenoch | The Guardian
https://www.theguardian.com/politics/2025/mar/19/factcheck-kemi-badenoch-conservative-leader-claim-that-net-zero-is-impossible-by-2050

The Conservative party leader, Kemi Badenoch, officially ditched net zero by 2050 as a Tory policy this week. The target was signed into law in June 2019 by her predecessor Theresa May, the then prime minister. So what arguments did Badenoch make for reversing?

Analysis by the London School of Economics has found that, though reaching net zero by 2050 initially costs between 1% and 2% of GDP a year, it will save money by about 2040. To put that into context, the UK spends about 11% of GDP on healthcare, and 10% on social security including pensions. The money spent on reaching net zero is also an investment, according to the most recent carbon budget; for example, upgrading the electricity grid or updating homes.

A former minister made this point in parliament in 2022: “Our latest estimates put the costs of net zero at under 2% of GDP – broadly similar to when we legislated for it two years ago – with scope for costs of low-carbon technologies to fall faster than expected.” Wise words from Badenoch herself.

The Office for Budget Responsibility has analysed the Climate Change Committee’s plans and found: “From 2040 onwards, net operating savings are projected to outweigh investment costs. And by 2050, the CCC projects a £19bn annual saving relative to its baseline emissions scenario.” If similar savings of the same size continued in the years beyond 2050, investment costs would be completely offset by 2070. The same report found “unmitigated climate change would ultimately have catastrophic economic and fiscal consequences for the UK”.

carbon capture elektřinou do moře má dlouhou historii. možná jsou carbon capture metody, které nejsou nesmysl, přeci jen...
Biorock - Global Coral Reef Alliance
https://www.globalcoral.org/biorock-coral-reef-marine-habitat-restoration/

Forget carbon neutral, Northwestern takes concrete NEGATIVE
https://electrek.co/2025/03/25/forget-carbon-neutral-northwestern-develops-carbon-negative-concrete/

We have developed a new approach that allows us to use seawater to create carbon-negative construction materials. Cement, concrete, paint, and plasters are customarily composed of or derived from calcium- and magnesium-based minerals, which are often sourced from aggregates –– what we call sand. Currently, sand is sourced through mining from mountains, riverbeds, coasts and the ocean floor. In collaboration with Cemex, we have devised an alternative approach to source sand — not by digging into the Earth but by harnessing electricity and CO2 to grow sand-like materials in seawater.