The hottest Decarbonization Substack posts right now

And their main takeaways
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Top Science Topics

The Shrinking Economic Weight of Energy

The Honest Broker Newsletter • 1177 implied HN points • 02 Mar 26
🌞 Climate & Environment Decarbonization
  1. Since 1970 the physical energy intensity of major fossil fuels has fallen sharply—about 70% for gasoline, 64% for natural gas, and 84% for coal—driven by 1970s price shocks, policy, technology, and a shift toward services.
  2. The 1970s were a turning point: economic growth began to decouple from rising fuel use so GDP could grow while physical fuel consumption fell, but the share of GDP spent on energy still swings with volatile global commodity prices.
  3. Coal now represents a vanishingly small share of the economy (around 0.1% of GDP) despite high political attention, while electricity’s intensity has declined less because the economy is electrifying and could rise again if EVs and AI data centers boost demand.

⚛️ A nuclear step forward—maybe

Faster, Please! • 1553 implied HN points • 05 Mar 26
🌞 Climate & Environment Decarbonization
  1. A new kind of nuclear reactor has been approved, offering a path to reliable, carbon-free power, but small modular reactors remain expensive and their economics will only improve if costs fall with repeated, mass-produced builds.
  2. Electricity demand is rising fast because of AI data centers, electric vehicles, and electrified heating, so the grid needs much more generation and transmission soon; in the near term solar and batteries will add capacity while natural gas provides reliability.
  3. Data centers function like infrastructure rather than big job creators — they use few permanent staff, bring substantial tax revenue, and impose little strain on local services; they can also spur local power investments (including on-site small modular reactors), though opposition often mixes environmental concerns with distrust of big tech.

Energy Cheat Sheet

Construction Physics • 85601 implied HN points • 20 Dec 24
🌞 Climate & Environment Decarbonization
  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.

We could produce a lot of electricity on the land used for biofuels

Sustainability by numbers • 620 implied HN points • 27 Jan 26
🌞 Climate & Environment Decarbonization
  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%.

The Paris Delusion

The Honest Broker Newsletter • 2070 implied HN points • 22 Nov 25
🌞 Climate & Environment Decarbonization
  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.
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The German Grid Montage

Gordian Knot News • 102 implied HN points • 02 Mar 26
🌞 Climate & Environment Decarbonization
  1. The dominant technology depends heavily on nuclear overnight cost: if nuclear is cheaper than about $3,000/kW (2020 USD) you get low-cost, low-CO2 grids dominated by nuclear, but if nuclear is much more expensive the model shifts to coal or big wind/solar builds with much higher emissions.
  2. Dispatchable generation like nuclear reduces the need for massive wind/solar overbuild and backup gas because it can reliably follow load, while wind/solar force huge capacity, land use, and storage investments and still require substantial gas backup.
  3. The model is biased optimistic for renewables (no transmission costs, perfect foresight, no inertia/ancillary requirements), so the already-expensive high-renewable solutions in the runs understate real-world costs; batteries are rarely chosen and very high nuclear costs produce politically and economically extreme grids with high curtailment and embedded emissions.

Renewable Energy Won

Erik Explores • 737 implied HN points • 21 Dec 25
🌞 Climate & Environment Decarbonization
  1. Wind and solar paired with batteries are now cheaper than coal and can deliver reliable 24/7 power. The economics mean the energy debate over renewables versus fossil fuels is effectively over.
  2. Practical challenges remain, like upgrading grids, training installers, and storing energy across seasons, but these are solvable with investment and various solutions. Options include overbuilding renewables, heat pumps, hydrogen or ammonia, pumped hydro, and novel carriers like rechargeable metal powders.
  3. Political and expert skeptics who said renewables couldn’t scale or would need permanent subsidies were proven wrong as costs fell and deployment surged globally. Nuclear remains expensive and slower to replace aging plants, so renewables are expanding even in traditionally nuclear countries.

The Most Amazing Climate Policy Figure

The Honest Broker Newsletter • 2227 implied HN points • 16 Jun 25
🌞 Climate & Environment Decarbonization
  1. The U.S. has made steady progress in reducing carbon emissions while growing its economy. This decarbonization happened even with changes in political leadership and policies.
  2. A significant factor in reducing emissions has been the shift from coal to cleaner energy sources like natural gas and renewables. This change shows how technology can help improve environmental outcomes.
  3. Understanding why decarbonization has been consistent is important. It can help policymakers find ways to continue this trend and achieve goals like net-zero emissions by mid-century.

Revisiting the hot model problem

The Climate Brink • 845 implied HN points • 31 Jan 24
🌞 Climate & Environment Decarbonization
  1. Recent developments and data do not support the idea that the climate is more sensitive to emissions than previously thought.
  2. Certain climate models have high sensitivity to CO2, but community reviews have suggested narrowing down the range of climate sensitivity.
  3. The exact climate sensitivity estimates can vary across studies, but regardless, the priority remains the urgent need to decarbonize our society.

Gaining Steam

Doomberg • 9401 implied HN points • 06 May 23
🌍 World Politics Decarbonization
  1. Canadian Prime Minister Trudeau expressed serious commitment to nuclear power for the country's future energy needs.
  2. Grassroots efforts led by groups like Canadians for Nuclear Energy have influenced political outcomes in favor of nuclear power.
  3. Support for nuclear energy is growing in the US as leaders recognize its necessity for significant decarbonization of the economy.

Germany Celebrates Fealty To Depopulation Lobby With Shut Down Of Nuclear Energy Sector

Matt Ehret's Insights • 1316 implied HN points • 30 Apr 23
🌍 World Politics Decarbonization
  1. Germany and other European nations are shutting down nuclear energy sectors, citing concerns of sustainability and green energy production.
  2. Low dose radiation has been found to have positive health effects, despite common fears of radioactivity.
  3. Transitioning solely to solar and wind energy may not be as sustainable as expected, as it leads to toxic waste and high energy costs.

Population growth or decline will have little impact on climate change

Sustainability by numbers • 392 implied HN points • 15 Jul 25
🌞 Climate & Environment Decarbonization
  1. Population changes won't significantly change our climate situation because they happen too slowly compared to how quickly we need to reduce emissions.
  2. Even with more people in the future, their overall impact on temperature rise will be very small if we focus on reducing emissions effectively.
  3. To tackle climate change, the best approach is to decarbonize our economies rather than trying to limit population growth, which won’t solve the problem fast enough.

Hydropower and seasonal electricity storage

GEM Energy Analytics • 339 implied HN points • 31 Jan 24
🌞 Climate & Environment Decarbonization
  1. Hydropower with large reservoirs can store energy for a long time, helping balance electricity supply when renewable sources like wind and solar are low.
  2. As we move towards renewable energy, seasonal storage will be essential. However, using hydrogen for storage can be very expensive.
  3. Countries with more hydropower can better manage their energy needs, especially during peak demands, giving them an advantage over those that rely on costly alternatives.

China's Power Grid

Syncretica • 373 implied HN points • 18 Sep 23
🌍 World Politics Decarbonization
  1. China's power grid is undergoing significant changes with a focus on renewable energy sources like solar and wind.
  2. There is a shift towards energy storage solutions like battery storage and pumped hydro in China.
  3. Proper grid modeling is crucial to understand how renewable energy capacity is being deployed and connected across the country.

An introduction to (green) Hydrogen

GEM Energy Analytics • 299 implied HN points • 24 Oct 23
🌞 Climate & Environment Decarbonization
  1. Hydrogen is seen as important for reducing carbon emissions, but it's not a complete solution. It can help in specific tough areas but isn't the only answer.
  2. Producing hydrogen currently causes pollution because most of it is made from natural gas or coal. Only a tiny bit comes from clean methods like renewable energy.
  3. Green hydrogen is expensive to produce, and its high costs mean it will be limited. It's better used in areas where alternatives like electricity don't fit, not for everyday home heating or personal cars.

Why the World is Watching Houston's Remarkable Energy Transition

This Week in MCJ (My Climate Journey) • 176 implied HN points • 04 Oct 23
🌞 Climate & Environment Decarbonization
  1. Houston's remarkable energy transition is being closely watched by the world due to its industrial prowess and diverse workforce.
  2. Perceptions of Houston as a city focused on preserving the energy status quo are changing as traditional energy companies are investing in clean technologies.
  3. Houston has the opportunity to become a leader in climate tech by leveraging its resources, attracting investment, and supporting climate-focused startups.

Putting Southeast Asia on the Climate Tech Map

This Week in MCJ (My Climate Journey) • 157 implied HN points • 01 Mar 23
🌞 Climate & Environment Decarbonization
  1. Southeast Asia is a region with significant potential for climate tech innovation and investment.
  2. There is a need for highly scalable, decentralized solutions in Southeast Asia's climate tech landscape.
  3. Opportunities in Southeast Asia include addressing emissions from land use change and agriculture, and focusing on growth tailwinds for high-growth climate tech companies.

Grid Upgrade - Part 1: the reasons

GEM Energy Analytics • 139 implied HN points • 07 Sep 23
🌞 Climate & Environment Decarbonization
  1. We need to upgrade our electricity grid because electricity use is rising with new technology and applications. This includes electric cars and heating, which all require more power.
  2. The grid must handle a lot more energy generation from renewable sources like wind and solar. This means we need to build more infrastructure to support the increased output.
  3. Many new energy projects are located far from where the electricity is needed. To solve this, we must improve connections and cooperation between regions to reliably deliver energy where it’s required.

A few basic truths about offshore wind

Jérôme à Paris • 510 implied HN points • 10 Oct 23
🌞 Climate & Environment Decarbonization
  1. Offshore wind was meant to be more expensive and a side show in the energy transition.
  2. Banks took construction risks initially, leading to offshore wind being almost as cheap as onshore wind in some regions.
  3. Offshore wind is necessary in some places due to geographical constraints and can provide diversification in renewable energy systems.

The Climate Fix Book Club, Chapter 9 & Full Book

The Honest Broker Newsletter • 274 implied HN points • 16 Feb 24
🌞 Climate & Environment Decarbonization
  1. Setting clear goals is crucial for progress, even if there are debates around the specifics. Policies should focus on addressing the root causes of issues, not just consequences.
  2. Decarbonization of the economy can happen through improving energy efficiency and transitioning to low-carbon energy sources. These are essential to meet atmospheric carbon dioxide targets.
  3. Efforts to reduce carbon emissions should consider the balance between economic growth and environmental impact. Decarbonizing energy supply is crucial for significant progress.

AI’s climate footprint, a nuclear renaissance, and the new climate subsidy wars 🔥

Climate Money • 19 implied HN points • 30 Jan 24
🌞 Climate & Environment Decarbonization
  1. Global electricity demand from data centers is set to double in the next two years due to AI's growth.
  2. Nuclear industry is experiencing a significant moment with uranium prices reaching a 16-year high.
  3. There is a new competitive landscape in the global climate technology space with Europe's entry leading to climate subsidy wars.

Weekly Dose of Optimism #79

Not Boring by Packy McCormick • 94 implied HN points • 02 Feb 24
🔬 Science Decarbonization
  1. Biden administration to offer a $1.5 billion loan to restart a Michigan nuclear power plant, signaling support for the nuclear industry.
  2. Nat Bullard's Decarbonization presentation highlights climate change challenges, renewable energy growth, and investment opportunities in clean tech.
  3. Elon Musk's Neuralink achieves a milestone by implanting a brain interface, potentially advancing cognitive abilities and treating neurological disorders.

Can Energy Security Trump Politics in Taiwan?

Taipology • 5 implied HN points • 20 Feb 24
🌍 World Politics Decarbonization
  1. There are signs that Taiwan's Democratic Progressive Party is internally aware of the country's need for atomic energy despite their anti-nuclear legacy.
  2. Taiwan's energy policy may soon shift towards extending the operation of existing nuclear power plants to address short-term energy needs, but a long-term solution will require new nuclear builds.
  3. Leadership, consensus, and a shift in policy are needed to elevate the conversation around nuclear energy in Taiwan as a national security and economic issue rather than a political one.