@gregdt.bsky.social
Physicist. Unlocking ambitious solutions to societal challenges Director Deeptech and Spin-Off excellence at Techleap. Co-founder at RIFF Lecturer. Author. TED Speaker.
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...
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...
Re-making coal!
Just wait a 100 million years
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
Why not?
14.10.2025 20:11 — 👍 0 🔁 0 💬 1 📌 0
Weird…
Does that work?
riffonsolutions.substack.com/p/what-have-...
And here is the first article!!
Some learnings from my climate journey…
riffonsolutions.substack.com/p/what-have-...
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
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…
More info here
www.linkedin.com/posts/greg-d...
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
I know. The irony is that we are visiting with a rental car which is… electric.
I am glad to know it can’t go on highways
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…
The doctor’s waiting room has some great reading 😎
@newscientist.com
Pour le “voter ecolo” je mettrai in gros gros bemol
28.06.2025 11:48 — 👍 0 🔁 0 💬 1 📌 0
A bit of a plug, but quite proud of that interview in @newscientist.com about the work we do at the Foundation.
You'll also find how I deal with optimism/pessimism ;-)
Thanks @tinymaddie.bsky.social for the great work
www.newscientist.com/article/2482...
People often wonder how climate activists stay positive. I feel like I can get behind this method from @gregdt.bsky.social
11.06.2025 16:31 — 👍 27 🔁 8 💬 3 📌 1
In 2023, the world produced 4.5 billion tons of oil, 9 billion tons of coal, and 2.5 billion tons of fossil gas (lnkd.in/eUUxhqc5). The combustion of which released about 37 billion tons of CO2 into the atmosphere (lnkd.in/e5t6bdhR)
www.circularity-gap.world
The video of the panel is available here
m.youtube.com/watch?v=NdXD...
Red cap
Proud to have contributed to the launch panel of the Make Science Great Again panel by @wedonthavetime.bsky.social
Knowledge is power. Defending science is critical for well functioning societies
Great Sankey diagram about the global material flows of plastics in 2022. About 400 million tons produced.
98% of the feedstock were fossil- coal accounts for 44% and oil for 40%
www.nature.com/articles/s43...
L’energie c’est simple et complexe
J’ai eu le plaisir de discuter énergie avec Vinz Kanté sur sa chaîne Limit. On part des bases pour discuter de nombreux aspects de la decarbonation.
Bonne écoute
www.youtube.com/watch?v=Ts_g...
