The hottest Climate Policy Substack posts right now

And their main takeaways
Category
Top U.S. Politics Topics
Doomberg • 7389 implied HN points • 27 Feb 26
  1. A deadly factory collapse helped prompt a French duty-of-vigilance law that makes large companies responsible for preventing serious human-rights, health, safety, and environmental harms across their subsidiaries and supply chains, with potential civil liability.
  2. The law is vague about whether and how companies must address climate change, causing uneven corporate responses and frustration among stakeholders.
  3. A landmark Paris trial against TotalEnergies could force companies to cut oil and gas production to meet national climate commitments, setting a precedent with big implications for multinational liability and France’s energy industry.
Faster, Please! • 2376 implied HN points • 16 Mar 26
  1. A high-profile scientist's bestselling book and repeated TV appearances pushed an urgent overpopulation message into the mainstream and made apocalyptic thinking widely familiar.
  2. When mainstream TV gives big audiences regular access to doomsday-minded experts, it can normalize fear and shift public attitudes about technological risks like AI.
  3. That kind of media-driven alarmism helped shape decades of pessimism about technology, economic growth, and humanity's future.
Doomberg • 8528 implied HN points • 14 Feb 26
  1. The EPA's removal of the endangerment finding undercuts the legal basis for many federal greenhouse gas rules and will trigger lengthy court battles over climate regulation.
  2. California's aggressive climate policies and isolated fuel infrastructure have left its refining system fragile, with Northern California especially vulnerable to losing gasoline, diesel, and jet fuel supplies.
  3. The Benicia refinery shutdown and related supply-chain effects are likely to cause sharp fuel-price spikes and a disorderly transition, and political efforts so far have only delayed rather than solved the problem.
The Crucial Years • 3408 implied HN points • 28 Feb 26
  1. Control of oil still drives geopolitics — recent attacks and embargoes raise prices and strengthen the fossil-fuel industry and its political backers.
  2. Small-scale solar, wind and batteries make societies harder to blackmail or bomb. Countries building decentralized renewables — like Cuba, Ukraine and China — are showing that these systems are more resilient than centralized oil infrastructure.
  3. Many leaders are still blocking clean energy and subsidizing fossil fuels, but renewables are spreading anyway through markets, activism and local projects, and public concern about climate is growing.
The Crucial Years • 6427 implied HN points • 16 Feb 26
  1. An El NiƱo looks likely to form and will push global temperatures to new records because it adds on top of the planet’s steady warming. Scientists warn this surge could raise the world to around 1.7°C above pre‑industrial levels this cycle and hasten hitting 2°C within the next decade or two.
  2. The extra heat will mean more extreme weather—stronger storms, heavier rains and floods, deeper droughts, and bigger wildfires—that will harm people, infrastructure, and ecosystems. That visible jump in warming will also shift politics and public opinion, and could lead to serious debates about risky options like solar geoengineering.
  3. The clean energy transition is gathering pace with expanding renewables, EV adoption, microgrids, and industrial moves to low‑carbon power, showing economic as well as climate benefits. Still, political choices that favor fossil fuels can block or slow this progress, so policy decisions remain crucial.
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Sustainability by numbers • 349 implied HN points • 17 Mar 26
  1. Under mainstream energy scenarios, electricity use per person in Africa will still be very low by 2050, leaving many people unable to power basic appliances or cool their homes.
  2. The key reason is weak economic growth — without stronger GDP and industrial development, electricity demand and access won’t rise much.
  3. Cheaper solar and storage can help lower costs, but they won’t close the gap by themselves; affordable power plus broad economic development are both needed to lift billions out of deep energy poverty.
The Honest Broker Newsletter • 3680 implied HN points • 17 Feb 26
  1. A recent EPA decision tries to reinterpret the Clean Air Act in a way that risks stepping into the judiciary’s role, which almost certainly invites lawsuits and constitutional conflict.
  2. Leaving water vapor out of the regulated greenhouse gases was the Endangerment Finding’s weakest point, because combustion-derived water vapor can measurably affect local and regional climate and therefore fits the logic used to regulate other gases.
  3. Including water vapor in regulation would be politically and practically chaotic and costly, so the real fix is for Congress to update the Clean Air Act or for litigation to force a clear judicial ruling.
The Honest Broker Newsletter • 3974 implied HN points • 14 Feb 26
  1. The EPA formally rescinded the 2009 Endangerment Finding and the vehicle greenhouse-gas rules by reinterpreting key words in the Clean Air Act, and it says this decision is based on legal reasoning rather than new claims about climate science.
  2. EPA's core legal claim is that vehicle emissions would have only a minuscule effect on global temperature and sea level, so they do not materially "contribute" to pollution that can "reasonably be anticipated to endanger" health or welfare, meaning the costs of regulation would outweigh de minimis benefits.
  3. The rule’s future is legally uncertain and could be overturned in court, and there is a clear opportunity for Congress to clarify the Clean Air Act and craft a bipartisan, coherent approach to greenhouse-gas policy.
The Crucial Years • 2700 implied HN points • 21 Feb 26
  1. The fast rush to build AI data centers could massively raise electricity use and lead to lots of onsite gas plants, heavy water use, and local pollution unless projects are powered by new clean energy.
  2. There’s real uncertainty about how much useful, profitable demand AI will actually create, so many proposed data centers may be speculative and the industry could be in a bubble.
  3. Communities and advocates are calling for pauses and stronger rules because of climate and local harms, and there’s a growing need for transparency and clean-energy requirements if these projects move forward.
The Honest Broker Newsletter • 1629 implied HN points • 23 Feb 26
  1. A smaller global population does not automatically mean lower energy use. Rapid development in large, low-income countries means total energy demand can keep rising even if population peaks.
  2. Even with fewer people overall, the number of wealthy people will likely keep growing, driving up demand for energy-intensive services like air conditioning and air travel. So per-person energy use and some forms of total energy demand can still increase.
  3. Lower population projections imply lower future CO2 emissions and mean many climate scenarios are outdated; updating population and growth assumptions points to less warming by 2100, though climate risks still remain.
Thinking about... • 744 implied HN points • 26 Feb 26
  1. A coordinated effort to dismantle democratic institutions by installing loyalists, gutting the civil service, redirecting public funds to private interests, and using legal power to protect allies and undermine the rule of law.
  2. Deliberate promotion of social and ecological collapse—through anti-vaccine stances, blocking green energy, and stoking disorder—to create disease, chaos, and violence that break national cohesion and enrich a few.
  3. Weakening national defense and oversight to empower foreign autocrats and billionaire enclaves, using intelligence failures, repressive security forces, and automated warfare risks to concentrate power and profit.
Common Sense with Bari Weiss • 811 implied HN points • 04 Mar 26
  1. Europe's once-strong push for aggressive net-zero and green energy has fractured. Skyrocketing energy costs and economic realities made those plans hard to sustain.
  2. Recent geopolitical turbulence, especially the war in Iran, has driven up oil and natural gas prices and put extra pressure on European economies and energy policy choices.
  3. Early political enthusiasm for big carbon prices and rapid green transitions is now meeting resistance as voters and governments prioritize affordability and energy security over ambitious climate goals.
The Honest Broker Newsletter • 3798 implied HN points • 02 Feb 26
  1. A high-profile economic review became hugely influential and helped shape global climate policy and the later rise of ā€œclimate riskā€ in finance.
  2. Its projections of rapidly escalating disaster losses relied on unsupported numbers and misrepresented sources, producing large forecast errors compared with actual losses.
  3. A peer-reviewed critique documented these mistakes but was largely ignored, showing that high-profile scientific errors can persist and continue to affect policy and finance.
The Crucial Years • 6407 implied HN points • 03 Jan 26
  1. Oil’s concentration and value drive conflict and geopolitical control, so reducing dependence on oil would cut a major motive for attacks and imperialism.
  2. Legal and political checks are currently weak against overreach, so solely relying on institutions to prevent aggression is risky.
  3. Decentralized clean energy—like rooftop solar, wind, and EVs with bidirectional charging—can shift power away from fossil-fuel holders and help make peace and energy security more achievable.
The Crucial Years • 2471 implied HN points • 27 Jan 26
  1. Big business and financial leaders have largely pulled back from climate leadership after political pushback, but public funds and big investors could still use their financial power to force change.
  2. Divesting from fossil fuels is both a moral choice and a smart financial move, since renewables and batteries are cheaper and funds that shunned fossil stocks have often seen better returns; staying invested has cost taxpayers billions.
  3. Scientists warn the window to avoid dangerous warming is smaller than we thought and tipping points are real, so governments must speed up the clean-energy shift by scaling renewables, storage, and other clean technologies already proving they work.
Chartbook • 329 implied HN points • 28 Feb 26
  1. The US natural gas industry is increasingly built around exports, which strongly shapes its business strategy and political influence.
  2. A major discussion revisits Keynesian economics and assesses how Keynes’s ideas matter for current policy debates.
  3. There is growing focus on coalitions pushing decarbonization and on the situation of the remaining entities referred to as the "last Mauds" in America.
eugyppius: a plague chronicle • 228 implied HN points • 10 Mar 26
  1. In 2011 she supported Germany’s nuclear phase-out, saying Fukushima proved a worst-case accident could happen even in high-tech countries.
  2. Germany’s shutdowns and efforts to persuade other European nations away from nuclear have cut nuclear’s share of power and are blamed for higher energy costs and weaker industrial competitiveness.
  3. Now she says abandoning nuclear was a strategic mistake and urges the EU to lead in nuclear technology, but Germany’s government maintains its national phase-out is irreversible.
The Honest Broker Newsletter • 3660 implied HN points • 27 Dec 25
  1. A vocal movement treats every extreme weather event as obvious proof of climate change and uses those events to push urgent policy action.
  2. Their playbook is PANIC → ALARM → CURE: build advocacy narratives, constantly attribute harms to climate in the media, then present CO2 cuts as the clear remedy.
  3. That approach risks undermining mainstream climate science and public trust, creating obstacles to effective long-term climate policy and prompting calls for stronger scientific integrity.
The Honest Broker Newsletter • 2100 implied HN points • 13 Jan 26
  1. Scientific findings about climate are often simplified into dramatic one-liners, so media and politicians can end up misrepresenting what the underlying research actually says.
  2. Observed data show heatwaves and heavy rainfall have increased with warming, but there is no strong evidence that hurricanes, floods, droughts, tornadoes, hail, or lightning have become more frequent.
  3. Practical politics and public welfare shape energy policy: people resist costly rapid transitions, emissions intensity has been falling for decades, and the most extreme 'business as usual' emissions scenarios were unrealistic and have been largely abandoned.
The Honest Broker Newsletter • 3660 implied HN points • 08 Dec 25
  1. Property/casualty insurers are earning record profits and strong underwriting gains, so the industry is financially healthy despite media claims of collapse.
  2. Underwriting returns swing up and down year-to-year but show no long-term trend, meaning insurers are not in a systemic underwriting crisis.
  3. A booming climate‑risk vendor industry produces wildly different risk models, and those uncertain assessments have helped justify big insurance rate hikes even though the direct climate-driven increase in losses appears small.
Gordian Knot News • 168 implied HN points • 06 Mar 26
  1. The nuclear regulatory system acts like a swarm: individual inspectors just follow rules, but the system as a whole keeps tightening radiation limits and creates costly, sometimes absurd requirements.
  2. Fossil fuel prices used to limit how expensive regulated nuclear could get, but big taxpayer subsidies for reactors and moves to outlaw fossil dispatch remove that cap and let regulatory-driven costs soar.
  3. The proposed remedy is a complete overhaul of nuclear regulation: the current swarm-like system must be replaced with a reorganized regulatory framework, for example via a Nuclear Reorganization Act.
Heterodox STEM • 348 implied HN points • 22 Feb 26
  1. Using 'many scientists believe' as proof is not the same as presenting hard evidence, and for issues like whether the polar jet stream is weakening the clear observational data is limited or inconclusive.
  2. Much climate reasoning depends on open-loop computer models that aren't validated the way engineering models are. Funding and media incentives can push scientists to emphasize more alarming model results.
  3. Political and funding pressures can distort scientific priorities and public messaging, so consensus and authority shouldn't replace testable evidence. Real scientific progress often overturns majority views, so skepticism and empirical testing must stay central.
The Honest Broker Newsletter • 1521 implied HN points • 08 Jan 26
  1. Leaving the UNFCCC may not change binding U.S. obligations, but it surrenders American influence; that loss of influence could let other countries adopt trade, technology, or supply-chain rules that hurt U.S. workers and the economy.
  2. The U.S. helped create the IPCC to ensure international climate assessments stayed balanced; staying engaged helps protect the IPCC’s scientific integrity and prevents the body from being weaponized against U.S. interests.
  3. Multilateral institutions — including scientific ones — are important sources of U.S. soft power and tie directly to economic and security issues like trade and critical minerals, so the U.S. should work to improve and lead them rather than withdraw.
The Honest Broker Newsletter • 2973 implied HN points • 03 Dec 25
  1. A major climate‑economics paper was retracted for substantial errors after more than a year, even though it had become highly influential in media and policy.
  2. Many powerful institutions and some outlets initially downplayed or continued to rely on the flawed results, highlighting how entrenched science can shape real‑world financial and policy decisions.
  3. There are hopeful signs of correction: critics and better journalism brought problems to light, and some experts argue research should focus more on targeted, practical questions instead of sweeping long‑range macro projections.
The Honest Broker Newsletter • 2070 implied HN points • 22 Dec 25
  1. The financial world reframed climate change as ā€œclimate riskā€ by tying it to extreme weather, but real-world trends in most extremes are unclear and rising disaster losses are mainly due to more people and assets in harm’s way.
  2. Framing risks as both physical and transition hazards gave finance a powerful, self-justifying way to push a global shift toward low‑carbon outcomes, and that pressure spread rapidly through businesses and governments with little consequence for exaggeration.
  3. Methods to quantify climate risk—scenario analyses and new proprietary models—are deeply flawed or outdated, yet regulatory demand created a large market for these unreliable products, so required disclosures tend to produce the very risks they claim to measure.
The Crucial Years • 2600 implied HN points • 11 Dec 25
  1. Oil still shapes geopolitics and can drive coercive, even pirate-like actions as states treat fossil fuels as concentrated sources of power and wealth.
  2. Moving to solar and wind would decentralize energy and make conflicts over resource locations far less likely, so speeding the clean-energy transition also undermines authoritarian, resource-driven power.
  3. The energy transition is making progress—court wins for offshore wind, battery recycling advances, and China's lead—but it faces big obstacles from political rollbacks, EPA denial of climate science, booming energy-hungry datacenters, and worsening extreme weather.
Marginal Carbon • 138 implied HN points • 14 Oct 24
  1. Countries with a history of high carbon emissions have run out of their fair share of carbon budget. They keep adding to their carbon debt with every new emission.
  2. To keep temperatures safe, all emissions beyond what's allowed must be removed. This means we need to deal with past, present, and future excess emissions.
  3. While cutting emissions is the main goal, some emissions are better dealt with using carbon removal strategies, called 'CDR-optimal' emissions.
The Honest Broker Newsletter • 2532 implied HN points • 01 Dec 25
  1. In 2025 the continental United States had no hurricane landfalls, even as the Atlantic produced unusually powerful storms and multiple Category 5 hurricanes that caused heavy losses in the Caribbean.
  2. Long-term records show no upward trend in U.S. hurricane landfalls or major hurricane landfalls, and global ACE and ACE-per-hurricane also show no clear trend, which challenges simple claims that warming has already produced fewer but more intense storms.
  3. A peer-reviewed review from 2005 concluded that strong links between global warming and hurricane impacts were premature, and later-revealed efforts by some assessment authors tried to exclude that work from major reports, though the review has remained in the literature and widely cited.
The Crucial Years • 10712 implied HN points • 27 Jun 25
  1. Bill Moyers was a prominent figure in journalism and activism, known for his deep empathy and understanding of social issues. He exemplified what it means to be an engaged citizen and leader.
  2. His approach to interviewing was all about listening, which is rare in today's political landscape where talking often overwhelms conversation. This listening quality helped him connect with people and share meaningful stories.
  3. Moyers' legacy shows the importance of curiosity and reality-based understanding in navigating complex challenges, especially in today's times when society faces significant political and environmental issues.
Gordian Knot News • 161 implied HN points • 27 Feb 26
  1. Public support for nuclear power mainly depends on cost — people will back it if it delivers cheap electricity.
  2. Survey wording matters because many respondents pick "somewhat" rather than "strongly," showing pragmatic, conditional support instead of ideological commitment.
  3. If nuclear were priced near its realistic "should-cost," it would likely win broad approval since most people just want cheap, reliable, low-emission power.
The Rubesletter by Matt Ruby (of Vooza) | Sent every Tuesday • 570 implied HN points • 23 Jan 26
  1. Recent actions by the administration are alienating allies and creating international embarrassment, suggesting an erratic, ego-driven foreign policy.
  2. Proposed redevelopment plans for Gaza are tone-deaf and focus on flashy luxury projects while ignoring worker safety, local needs, and the human cost.
  3. Heavy-handed domestic enforcement, like the ICE actions in Minnesota, has provoked strong community resistance and shows how surveillance and force can backfire, highlighting rising polarization and authoritarian tendencies.
Doomberg • 8742 implied HN points • 08 Jul 25
  1. China is accused of using climate activism to undermine American energy by funding groups that oppose it. This strategy aims to weaken the U.S. as a global competitor.
  2. There is concern that the influence of Chinese money is being ignored while debates focus on climate change risks. This creates tension between political parties over the framing of climate issues.
  3. Despite the push for renewable energy in the West, China continues to consume a large amount of coal, benefiting from the West's climate policies while enhancing its own industrial and military strength.
The Honest Broker Newsletter • 2247 implied HN points • 20 Nov 25
  1. A new UN-backed ā€œinformation integrityā€ push frames reliable climate information narrowly and treats dissenting views as misinformation, opening a pathway to police and suppress opposing speech.
  2. Efforts to cancel or silence climate dissent aren’t ending — powerful institutions and networks (governments, NGOs, universities, foundations, litigation, and climate industry actors) still have strong incentives to control the debate.
  3. Calling on companies and governments to police platforms, fund research, and run campaigns risks centralizing control over what counts as reliable climate information and channels large sums to sympathetic actors who will shape the public narrative.
The Honest Broker Newsletter • 2070 implied HN points • 22 Nov 25
  1. Saying the Paris Agreement alone caused a big drop in projected warming is misleading; the apparent improvement mostly reflects earlier scenarios that over‑predicted coal use and were therefore wrong, not clear policy-driven emissions cuts.
  2. Actual data show no acceleration in global decarbonization since Paris: emissions per unit of GDP have fallen at about 2% per year, far below the roughly 8% per year sustained cuts needed for deep decarbonization and never achieved by any country.
  3. We need honest, evidence‑based policymaking — stronger and effective measures to speed real decarbonization are required, while also protecting energy access, supply reliability, and affordability, instead of celebrating questionable success stories.
The Honest Broker Newsletter • 1315 implied HN points • 12 Dec 25
  1. Insurance companies are making record profits even as headlines claim a climate-driven insurance crisis, and recent premium hikes seem driven in part by rules to account for ā€œclimate riskā€ and the growth of risk-modeling services.
  2. The issue presents data across many areas — dark oil tankers, moderates’ confidence in science, an energy skills gap, red-state/blue-state electricity price differences, southern-hemisphere wheat, and a comeback of climate-realist views.
  3. More analysis is coming, including a follow-up on insurance and climate and a ranked list of major climate-research scandals, and the full material is available to paying subscribers.
The Honest Broker Newsletter • 1746 implied HN points • 24 Nov 25
  1. The critical debate in climate science is about whether past scenarios were flawed, not just forecasts of the future; a key 2017 study showed many high-emission scenarios relied on unrealistic assumptions about coal and fossil fuel growth.
  2. Despite evidence that extreme scenarios like RCP8.5 are unlikely, influential authors reframed them as ā€˜worst cases,’ so thousands of studies and policy discussions still use outdated scenarios and risk drawing misleading conclusions.
  3. If the scenarios were fundamentally flawed from the start, then climate research, scenario development, and policy choices need major changes, and the fight over this history will shape who leads future climate science and policy.
Doomberg • 6294 implied HN points • 21 Jul 25
  1. California is introducing new rules for companies to report their climate impact by 2026. This means businesses will need to have clear roles for climate reporting and teams working together across different departments.
  2. These laws could affect many businesses, even if they only have one employee in California. So, companies will have to adjust their operations significantly to comply.
  3. The new regulations might seem like a big burden, especially since they could lead to more bureaucracy and paperwork for businesses trying to operate efficiently.
Anima Mundi • 432 implied HN points • 16 Jan 26
  1. Many major problems—climate breakdown, institutional decay, and worsening mental health—are connected as interest payments on an "entropy debt" because civilizations maintain order by exporting disorder across space and time.
  2. Modern civilization has exhausted the places and times to which it can export entropy—fossil fuels, colonial extraction, and psychological repression were ways to borrow order, and now the system is approaching saturation.
  3. The real solution is a civilizational shift from borrowing order to living on "entropy income" by relying on solar-driven flows and redesigning institutions and values. Efficiency or a simple energy switch won’t by itself erase the underlying debt.
The Honest Broker Newsletter • 3641 implied HN points • 18 Aug 25
  1. The interest in older research can sometimes feel politically motivated rather than genuinely scientific. Researchers often feel frustrated when their older work is only revisited during specific political or ideological contexts.
  2. Fact-checking often misses the mark by focusing on discrediting certain views instead of genuinely verifying information. It can be biased and doesn't always follow scientific standards.
  3. There is a clear need for more structured support for scientists in addressing the media and factual accuracy. Professional channels should help scientists correct the record rather than put pressure on them from journalists.
Adetokunbo Sees • 104 implied HN points • 21 Feb 26
  1. Leaders who downplay climate risks and choose short-term economic gains over mitigation drive higher emissions and worsen environmental damage.
  2. Both historical and recent leadership choices have caused large environmental and human costs, and projections show hotter temperatures, higher seas, longer heatwaves, and economic losses by mid-century.
  3. Grassroots activism, informed voting, and public awareness campaigns are practical ways to push leaders toward stronger climate action and reduce future harm.