The hottest Climate & Environment Substack posts right now

And their main takeaways
Category
Top Climate & Environment Topics
The Crucial Years • 4115 implied HN points • 06 Jan 26
  1. Greenland's massive ice sheet is its most important strategic asset because if it melts it could raise global sea levels by many feet and disrupt ocean currents, changing climates and flooding coastlines worldwide.
  2. Talk of seizing Greenland is a dangerous, colonial-minded idea that would violate Greenlanders' sovereignty, strain international alliances, and overlooks that most Greenlanders oppose joining the U.S.; Greenland has already banned new oil exploration and relies largely on renewables.
  3. Practical climate action works and matters: community organizing, clean transport like e-bikes, and renewable projects (from floating offshore solar to solar on reclaimed Superfund land) can help, but policy choices — for example on energy-efficiency standards for manufactured homes — will determine who benefits and who pays.
The Honest Broker Newsletter • 1776 implied HN points • 26 Jan 26
  1. Estimated annual catastrophe losses rose sharply in nominal dollars from 2020 to 2025, but much of that increase is driven by greater exposure — more construction and higher construction prices — rather than clear evidence of climate-driven loss growth.
  2. When losses are measured as a share of global GDP, weather-related disaster losses have not increased since 1990 and were below the long-term average in 2025.
  3. Different firms produce different loss totals and insured-loss numbers are more reliable than total loss estimates; to detect climate signals you should look at climate data rather than economic loss data, and keeping disaster impacts low will require continued effort.
Construction Physics • 85601 implied HN points • 20 Dec 24
  1. Energy is the ability to do work, like moving or changing things. Everything we do requires energy, and we can't create or destroy it, only change its form.
  2. Most of the energy we use gets wasted, with many losses occurring during energy transformations. Only about a third of the energy consumed goes towards useful work.
  3. Hydrocarbons, like oil and gas, are easy to store and transport, but as we shift to electricity, we need better storage solutions to manage fluctuations in supply and demand.
The Honest Broker Newsletter • 1864 implied HN points • 22 Jan 26
  1. Population projections for 2050 have been revised downward. Yet global energy demand is still expected to grow a lot, so fewer people doesn't automatically mean less energy use.
  2. Electric vehicle adoption is projected to rise dramatically around the world, especially in developing regions, and that could sharply reduce demand for liquid fuels if it accelerates. Small changes in EV trends can ripple across many other energy projections.
  3. Fossil fuels are likely to remain a large part of the energy mix through mid-century, with oil and gas plateauing and coal declining more slowly than hoped. The fastest way to cut emissions quickly would be to replace coal-fired power plants.
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.
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The Crucial Years • 4025 implied HN points • 26 Dec 25
  1. The 2026 midterm elections are pivotal and could either entrench authoritarian power or give people the leverage needed to protect democracy and advance climate policy.
  2. The federal government is actively blocking renewable projects and privileging fossil-fuel interests, using shaky national-security and political rationales that hurt jobs, energy independence, and the climate.
  3. Despite political headwinds, clean-energy momentum keeps growing — cheaper solar, rooftop adoption, booming e-bike use, and agrivoltaics are real wins — while huge fossil projects like the Alaska LNG pipeline look risky and likely to burden taxpayers.
The Crucial Years • 2471 implied HN points • 15 Jan 26
  1. Small plug-in solar systems are cheap, quick to install, and can supply meaningful electricity for apartments and homes. They provide portable, reliable power during outages and help people become more self-reliant.
  2. Current rules and utility restrictions block plug-in solar in many places, but changing laws would make these systems far cheaper and more accessible. Campaigns and state bills are working to legalize plug-in solar so renters and apartment dwellers can benefit too.
  3. Large-scale solar and battery storage are essential to cut emissions and save money, but national policies, tariffs, and industrial choices determine how fast deployment happens. Places that support deployment see rapid growth, while hostile policies or trade barriers can slow progress.
The Honest Broker Newsletter • 2188 implied HN points • 15 Jan 26
  1. 2025 was a fairly typical year for global tropical cyclone landfalls, with 19 landfalls worldwide and 7 of those being major hurricanes.
  2. Long-term records (1970–2025) show no clear upward trend in global landfall frequency, though the proportion of landfalls that are major storms has increased and may be part of natural multi-decadal variability.
  3. Historical cyclone data are heterogeneous and observation changes make trend detection and attribution difficult. As a result, confidence in long-term trends is low and a clear human-caused signal in landfall frequency or economic losses may not be detectable for decades.
Common Sense with Bari Weiss • 445 implied HN points • 25 Feb 26
  1. Recent winters have felt more extreme, but scientists currently don’t have strong evidence that the most intense nor’easters are getting steadily stronger over the long term.
  2. The IPCC plays a key role by sorting through hundreds of different and sometimes conflicting studies to give cautious, evidence-based conclusions instead of relying on any single paper.
  3. Science advances by testing claims, being honest about uncertainty, and changing course when new evidence shows earlier conclusions were wrong.
The Honest Broker Newsletter • 3032 implied HN points • 31 Dec 25
  1. 2025 had one of the lowest global death rates from extreme weather on record, at under 0.8 deaths per million people.
  2. This low toll is part of a long-term decline: death rates from extreme weather have fallen dramatically since the 1960s as better science, technology, policy, and greater wealth reduced vulnerability.
  3. Progress doesn’t eliminate risk—large, deadly disasters can still occur, and the data have limits (older undercounts and exclusion of extreme temperature impacts), so continued preparation and careful tracking are essential.
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 • 2846 implied HN points • 29 Dec 25
  1. Bad or fake datasets and low-quality models have been used in climate research and major assessments. Those errors need prompt correction and retraction to restore scientific trust.
  2. Major climate assessments and agencies are highly politicized and swing with each administration, which undermines credibility. Depoliticizing these institutions would help rebuild public trust.
  3. Financial “climate risk” products and the continued reliance on extreme, implausible emissions scenarios are distorting research and policy. Climate science should use more realistic scenarios and clearer links between risks and evidence.
David Friedman’s Substack • 314 implied HN points • 02 Mar 26
  1. In the short run, warming tends to make us worse off because societies and systems are optimized for current conditions, but over centuries people can move, change crops, and adapt so long-run effects may be less harmful or even beneficial.
  2. Moderate warming can increase habitable land (cold areas warm more than hot ones) and CO2 fertilization raises crop yields and lowers water needs, while land loss from sea-level rise is much smaller than these potential gains.
  3. Burning all known fossil fuels could raise global temperatures by roughly 12°C over millennia and raise sea level by about 50 meters, which would be severe for many regions but, judging by past warm periods, not necessarily globally uninhabitable; the rate of warming matters because rapid change would be far more catastrophic than slow change that allows adaptation.
Construction Physics • 27768 implied HN points • 29 May 25
  1. Solar energy can supply a significant part of electricity demand, with estimates suggesting it could meet 30-40% without needing a lot of extra infrastructure.
  2. Affordable batteries are crucial as they help balance supply and demand, not just for solar but for any energy system.
  3. If the costs of solar panels and batteries keep dropping, we might be able to meet up to 80% of electricity demand with solar, which makes the future of solar power look promising.
Faster, Please! • 731 implied HN points • 16 Feb 26
  1. America’s shale boom was a joint effort: government funded early science and field trials while private companies did the risky tinkering and cost-cutting to make it commercial.
  2. Lawmakers are trying to copy that playbook for advanced (superhot) geothermal by using public funding to absorb early technical risk and spur demonstrations.
  3. If government-backed R&D and private-sector scaling work together again, geothermal could be developed into a large, competitive clean energy source.
The Green Techpreneur • 48 implied HN points • 06 Mar 26
  1. Design your capital formation to make the business bankable before you try to scale, so financing choices shape product and milestones rather than the reverse.
  2. Use capital stacking—mix equity, grants, and debt—and plan exactly who enters the stack, when they join, and which milestones unlock their participation.
  3. Be capital efficient and operationally disciplined. Focus on predictable revenue, cashflow, and clear uses of funds, and avoid financing too many large initiatives at once so investors and lenders can trust your plan.
Sustainability by numbers • 583 implied HN points • 16 Feb 26
  1. Energy use and emissions are hard to judge without context, so comparing common household activities helps show what’s actually big or small.
  2. The numbers are rough, based on typical usage, and the tool is deliberately simple to show order-of-magnitude differences rather than exact watt-hours.
  3. Users are invited to give feedback on wrong assumptions, broken components, missing items, or useful features, and the tool may later be expanded to include carbon-emissions comparisons.
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.
Global Shield's Newsletter • 59 implied HN points • 23 Oct 24
  1. Many countries are focusing on improving civil defense. This means everyone from the government to local communities needs to work together to be prepared for emergencies.
  2. Climate change is making existing global threats worse. Problems like pandemics and geopolitical tensions are now linked to changes in the climate.
  3. People need to listen actively to warnings about risks. If the audience isn't ready or willing to hear these messages, the warnings may not help at all.
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 Crucial Years • 1783 implied HN points • 12 Jan 26
  1. Keep the energy message simple: talk about affordability and the basic promise that clean energy is cheap, creates jobs, and can lower electric bills, using clear examples people understand.
  2. Policy is currently increasing electricity demand (think data centers and AI) while blocking cheap wind and solar, which drives up prices and effectively makes working families subsidize fossil fuel interests.
  3. Clean energy is winning globally — faster EV adoption, cheaper and more efficient solar like perovskites, big green finance, and new recycling tech mean we should accelerate renewables and protect public health rules now.
Sustainability by numbers • 454 implied HN points • 17 Feb 26
  1. An energy comparison tool got lots of user feedback and will be updated; a change log will be added and a carbon-emissions-equivalent feature is planned.
  2. Clearing the Air has been published in North America and is now available from major book retailers.
  3. Shortlisted for the Unwin Award, a recognition that highlights early-career non-fiction authors whose work makes a significant contribution.
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 “climate risk” 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.
Why is this interesting? • 784 implied HN points • 22 Jan 26
  1. Pando isn’t a forest of separate trees but one giant organism made of many trunks sprouting from a shared underground root system.
  2. It challenges the idea of an individual. What looks like many trees behaves like a single, redundant system—like a server farm or RAID array—where visible parts can be swapped while hidden infrastructure keeps things running.
  3. Even resilient systems have limits; human actions like fire suppression and unchecked deer populations are stressing Pando and could push its redundancy past a breaking point.
Anima Mundi • 576 implied HN points • 02 Feb 26
  1. We are quietly withdrawing our commitment to maintaining shared systems and infrastructure. Trading resilience for short-term efficiency shrinks margins for error and makes cascading failures and inequality more likely.
  2. The planet is storing heat and the impacts keep accumulating, so climate-driven risks will persist and compound even without dramatic new events. That truth erodes confidence in a stable future and reduces people's willingness to invest in long-term projects.
  3. Trust, cooperation, and belief in the future are fraying as people and nations pull back from each other, from treaties, and even from having children. That loss of social commitment undermines our ability to solve shared problems and sustain institutions.
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.
Caitlin’s Newsletter • 2370 implied HN points • 08 Dec 25
  1. The natural world is collapsing — whales fall silent, krill vanish, and oceans warm, signaling urgent ecological decline.
  2. Communities and people are enduring deep social and economic collapse, with addiction, abandoned towns, war, and widespread human suffering intertwined.
  3. In response to this ruin, small acts of tenderness and solidarity — meeting, sharing stories, and tending to one another’s wounds — offer a way to cope, resist, and heal.
Noahpinion • 30118 implied HN points • 10 Jan 25
  1. Wildfires are getting more common, and insurance companies can't keep up. When too many people claim losses at once, some might not get paid.
  2. Climate change is making wildfires worse, but we can't change it overnight. It's a big issue that affects fire patterns.
  3. We really need to prepare for wildfires better than before because they are becoming more frequent and damaging. Improving forest management and regulations is crucial.
Doomberg • 8484 implied HN points • 08 Aug 25
  1. Australia has a lot of natural resources, like coal and natural gas, which gives it a strong position in global energy markets.
  2. The country is trying to move to renewable energy sources like wind and solar, but this shift is causing serious problems for its electricity grid.
  3. As Australia adds more renewable energy, its electricity costs are rising and the system is becoming less reliable, showing the challenges of relying too much on intermittent power sources.
Common Sense with Bari Weiss • 2133 implied HN points • 11 Dec 25
  1. People who questioned the worst climate catastrophe claims were treated as pariahs even while accepting global warming; they argued the alarmism was overblown.
  2. Roger Pielke Jr. lost speaking invitations and faced a congressional investigation after arguing that rising disaster costs weren't linked to greenhouse gases.
  3. Those climate realists now claim a comeback and feel vindicated as the debate and public opinion shift.
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 Honest Broker Newsletter • 7988 implied HN points • 30 Jul 25
  1. A new climate report from the U.S. Department of Energy encourages open debate about climate science. It challenges some widely accepted views and aims to include differing opinions.
  2. The report's author believes climate change is real but not the biggest threat humanity faces. Instead, they argue that global energy poverty is a more pressing issue.
  3. The DOE is inviting public comments on the report for a more transparent discussion. They want to learn from feedback instead of just defending their conclusions.
Sustainability by numbers • 620 implied HN points • 27 Jan 26
  1. Putting solar panels on the roughly 32 million hectares now used for biofuels could generate about 32,000 TWh, which is roughly the world’s current annual electricity demand.
  2. That same land could easily power an all-electric global car and truck fleet (around 7,000 TWh), showing solar plus electrification is far more land-efficient than growing biofuels.
  3. Biofuels cannot realistically decarbonize aviation: using all current biofuels for jets would at best cover about one-third of demand, and collecting all waste cooking oils would only supply roughly 4%.
Justin E. H. Smith's Hinternet • 483 implied HN points • 25 Jan 26
  1. Greenland's future is framed as crucial to the fate of the whole planet, highlighting its global environmental and geopolitical importance.
  2. Historical imagery of a Moravian mission ties Greenland's colonial and cultural past to present concerns, suggesting history matters for understanding its current challenges.
  3. The content sits behind a paid, subscription-based publication and is presented as exclusive, with clear prompts encouraging readers to subscribe.
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.
Everything Is Amazing • 801 implied HN points • 17 Jan 26
  1. Sleeping outdoors can turn a vague idea of "nature" into a million small details — learning to ID trees and routines makes the world feel more familiar and alive.
  2. Modern wild camping is often practical and gear-driven: people use tarps, ridgelines, cars or vans, gyms and laundrettes to make living outside feasible while trying to follow Leave No Trace.
  3. It comes with real trade-offs — legal and safety risks, a risk of feeling privileged or exploitative, and the danger of treating nature as a quick health cure — so be cautious, respectful and realistic.