So long London!!! Today is my last day as a Londoner and from tonight on I will be an Amsterdamer… Mixed feelings as I love London but excited by what is coming

How the cost of useful energy has evolved for fossil fuels and modern “clean” technologies Spot the difference (Talking about costs not prices) www.sciencedirect.com/science/arti...

Less clouds, less glaciers. The earth is absorbing more sunlight and warming faster. And this is caused by climate change itself which is caused by the 1800 billion tons of CO2 we have emitted…

Great data viz by @ourworldindata.org showing the largest source of electricity in countries across the globe. Clearly a coal cluster in Southeast Asia and a lot of gas countries Nuclear dominates in a few countries only

Europe is too slow on electrification and it is a big problem. Despite 2 major energy crises, the narrative remains vague. The countries (like China) who are pulling ahead will maintain an advantage for quite some time. Nice wake up call from Fatih Birol in @financialtimes.com

Li-ion batteries costs decrease every time the installed capacity doubled. A recent studies looked at battery costs since 1991 (first Li-ion battery) and found that EVs became the driver for cost declines from 2000 (Toyota Prius). The learning rate since 2000 has been 25%

Electricity is probably the most versatile form of energy. It can produce force, heat, light, computation, chemicals In addition, the range of electrical power we use spans about 20 orders of magnitude from very low power electronics to the 22.5GW of 3 gorge dam (log scale below)

Reminder that an energy system based on combustion is very inefficient. Going from primary energy to useful energy, one loses almost 2/3 - a pity given that we extract close to 17 billion tons of fossil fuels per year. Electrification is a massive opportunity for efficiency!

Electricity is poised to become the workhorse of the energy system. For massive electrification to happen, that electricity needs to be abundant AND cheap. High time for policy-makers to work on electricity prices, the EU industry desperately needs that... www.ft.com/content/f241...

In 2025, global coal capacity increased by 3.5% but generation of electricity from coal decreased by 0.6%. This trend is particularly notable in China and India where renewables met the load growth. Coal plants are built as insurance more than primary resource

Great illustration of how carbon dioxide removal and emission reductions are complementary to reach the point where climate change will stop. And the less reduction we do, the less interesting/relevant removal is since removal is always more expensive.

Cool graph from @bloomberg.com showing the evolution of data centre capacity and the planned/announced projects. Data centres globally now consume close to 500TWh- basically as much as Germany. www.bloomberg.com/graphics/202...

Progress in batteries mean that they can now help decarbonise maritime transport. A recent paper shows that by 2030, electrification could apply to 30% of shipping energy demand and 20% GHG emissions… www.nature.com/articles/s44...

Great read on what AI can do for science. Yes it has the potential to accelerate science but not it will not replace scientists. The paper also makes a great point about the need to maintain critical thinking and not blindly trust results www.amacad.org/publication/...

Hydrogen versus batteries in road transport Hydrogen is far behind in every category one can think of, and the progress in batteries are only extending the gap. Perhaps time to totally stop talking about hydrogen for road transport? Source: www.iea.org/reports/glob...

2025 is now officially the third hottest year in record history. Climate is changing fast and impacts being felt more and more. At this pace, the 1.5 degrees mark will be crossed before 2030 (remember it is a 20-yr average) Source: climate.copernicus.eu/global-clima...

Chinese EVs are cheaper than US EVs BUT also better. The graph below compares the price of both as a function of range. But Chinese cars also offer superior characteristics for example in terms of fast charge Great read here: www.science.org/doi/10.1126/...

New Year, new challenges Happy to share that I'll be working on a new initiative this year to accelerate the emergence of radical ideas to solve big societal challenges and create a pipeline of investable and impactful scientific ventures. We call it RIFF...

This is what the US department of Energy was posting on X (Twitter) before Christmas. Coal is the worst fossil fuel. There is no such thing as clean coal

Interesting graph comparing investments in clean and fossil energy since 2015. techcrunch.com/2025/06/06/c...

It's now official With the 55 other intrepid runners that made the run we entered the @GWR Guinness World Records for the deepest marathon !!! What an adventure it was.

The G-word and why we need to talk about it. In my latest Substack, I lay out some thoughts on Solar Radiation Modification (aka geo-engineering) and why we need more public research on the topic. Please subscribe (and react) riffonsolutions.substack.com/p/we-need-to...

We need to talk about the G-word…

Geo-engineering is a contentious topic, yet one that we need to seriously research.

riffonsolutions.substack.com

A great graph to explain what the energy transition - electricity is about 20% of final energy demand, we need to electrify most sectors (estimates now show that up to 70% is possible) - electricity is still 60% fossile so we need to decarbonise it ember-energy.org/latest-insig...

There are different ways to measure the global economy - 112 trillion dollars - 600 exajoules of primary energy, 400 in final energy - 107 billion tons of natural resources www.materialflows.net/visualisatio...

When it comes to climate, doomism is a western luxury because we’re less affected. The future is what we make of it… the longer we wait to act the more severe the consequences of climate change will be

Not every day you break a word record. But for me this was yesterday!! We ran the world’s deepest marathon. An impressive immersion in a working mine

Launching my Substack today !! This will build on the content I am sharing regularly on LinkedIn and provide deeper thoughts on the fast changing space of climate and deep tech. riffonsolutions.substack.com

Riffing on solutions | Greg De Temmerman | Substack

A page to discuss solutions to big societal challenges with a focus on deep tech for energy and climate. My take as a pragmatic optimist on the role of science and innovation. Warning: I love numbers....

riffonsolutions.substack.com

2 weeks to go before the World’s deepest marathon- 1.4 km below the surface. This is going to be a world record if we make it and this is also for charity. Any donation is appreciated worldsdeepestmarathon.raiselysite.com/greg-de-temmer…

100 days to go !!!! 🏃‍♂️ With a group of 60 people, we'll attempt a record-breaking marathon, 1,120m below sea level in Boliden's Garpenberg mine in Sweden. This is done to raise money for 2 charities and change discussions around mining (critical for energy...) Consider donating

My family is against electric cars… Have been listening to all the usual misinformation arguments for 90 minutes and people wonder why I am quiet…