Kees van der Leun
@sustainable2050.bsky.social
39 years of experience in the energy transition. Building Common Futures, a new energy transition consultancy.
Posts about energy, climate, Ukraine & more.
Also on Mastodon.
Reposts not an endorsement, views my own. #EnergySky
Posts about energy, climate, Ukraine & more.
Also on Mastodon.
Reposts not an endorsement, views my own. #EnergySky
And... yet another (rounded) 14°C December day in the central Netherlands! Not sure if this ever happened before.
December 9, 2025 at 7:04 PM
And... yet another (rounded) 14°C December day in the central Netherlands! Not sure if this ever happened before.
And... another 14°C December day, here in the central Netherlands.
December 8, 2025 at 7:36 PM
And... another 14°C December day, here in the central Netherlands.
Temperature here peaked at 14.1°C in the end (a new record for the date); 15.0°C (59F) in the southwest.
December 7, 2025 at 9:28 PM
Temperature here peaked at 14.1°C in the end (a new record for the date); 15.0°C (59F) in the southwest.
One winter night in the Netherlands, 2025...
Temperature here in Utrecht, at 9 p.m.: +13.8°C (57F).
Temperature here in Utrecht, at 9 p.m.: +13.8°C (57F).
December 7, 2025 at 8:25 PM
One winter night in the Netherlands, 2025...
Temperature here in Utrecht, at 9 p.m.: +13.8°C (57F).
Temperature here in Utrecht, at 9 p.m.: +13.8°C (57F).
Polls looking good for those of us that would like to see Orbán (Fidesz) voted out in April.
December 7, 2025 at 2:43 PM
Polls looking good for those of us that would like to see Orbán (Fidesz) voted out in April.
Overall, we're still speeding in the wrong direction!
December 7, 2025 at 8:04 AM
Overall, we're still speeding in the wrong direction!
It's December, when it used to be winter here at 52 degrees North. We have four straight days of +13°C (55F) ahead. 24-hour average temperature above normal for April.
December 7, 2025 at 6:55 AM
It's December, when it used to be winter here at 52 degrees North. We have four straight days of +13°C (55F) ahead. 24-hour average temperature above normal for April.
Confirmed: Another big jump in atmospheric CO2, (still) measured at Mauna Loa: the November average was ~426.5 ppm, that's 2.6 ppm higher than last year!
December 6, 2025 at 9:06 PM
Confirmed: Another big jump in atmospheric CO2, (still) measured at Mauna Loa: the November average was ~426.5 ppm, that's 2.6 ppm higher than last year!
Not by our Daddy?
December 6, 2025 at 5:16 PM
Not by our Daddy?
Maybe Rutte should talk to his daddy.
December 5, 2025 at 9:41 PM
Maybe Rutte should talk to his daddy.
Hee, @trouw social media experts, het is niet heel snugger om hier binnen 4 minuten 26 berichten te dumpen.
December 5, 2025 at 9:14 PM
Hee, @trouw social media experts, het is niet heel snugger om hier binnen 4 minuten 26 berichten te dumpen.
Not the Onion:
December 3, 2025 at 9:46 PM
Not the Onion:
While D66 and CDA are trying to put together a normal, responsible, well functioning Dutch government coalition, Rutte's VVD successor receives a Milei minister from Argentina to discuss cutting bureaucracy.
December 3, 2025 at 6:40 PM
While D66 and CDA are trying to put together a normal, responsible, well functioning Dutch government coalition, Rutte's VVD successor receives a Milei minister from Argentina to discuss cutting bureaucracy.
Another big jump in atmospheric CO2, (still) measured at Mauna Loa: Based on daily values, the November average was ~426.5 ppm, that's around 2.7 ppm higher than last year!
December 1, 2025 at 10:08 PM
Another big jump in atmospheric CO2, (still) measured at Mauna Loa: Based on daily values, the November average was ~426.5 ppm, that's around 2.7 ppm higher than last year!
Revealed: Europe’s water reserves drying up due to climate breakdown
Scientists find large swathes of southern Europe are drying up, with ‘far-reaching’ implications
www.theguardian.com/environment/...
Scientists find large swathes of southern Europe are drying up, with ‘far-reaching’ implications
www.theguardian.com/environment/...
November 29, 2025 at 9:44 PM
Revealed: Europe’s water reserves drying up due to climate breakdown
Scientists find large swathes of southern Europe are drying up, with ‘far-reaching’ implications
www.theguardian.com/environment/...
Scientists find large swathes of southern Europe are drying up, with ‘far-reaching’ implications
www.theguardian.com/environment/...
Arctic sea ice extent is steadily decreasing. We're now at a record low for this time of the year.
zacklabe.com/arctic-sea-i...
(That's @zacklabe.com here)
zacklabe.com/arctic-sea-i...
(That's @zacklabe.com here)
November 29, 2025 at 8:47 PM
Arctic sea ice extent is steadily decreasing. We're now at a record low for this time of the year.
zacklabe.com/arctic-sea-i...
(That's @zacklabe.com here)
zacklabe.com/arctic-sea-i...
(That's @zacklabe.com here)
En Logtenberg zelf?
November 28, 2025 at 6:21 PM
En Logtenberg zelf?
"No backsliding: that turned out to be the highest achievable in Belém." #COP30
I've got news: having emitted another 53 billion tonnes of greenhouse gases in a year and then making no progress in climate negotiations is backsliding.
cc @michaelemann.bsky.social
I've got news: having emitted another 53 billion tonnes of greenhouse gases in a year and then making no progress in climate negotiations is backsliding.
cc @michaelemann.bsky.social
November 24, 2025 at 9:45 PM
"No backsliding: that turned out to be the highest achievable in Belém." #COP30
I've got news: having emitted another 53 billion tonnes of greenhouse gases in a year and then making no progress in climate negotiations is backsliding.
cc @michaelemann.bsky.social
I've got news: having emitted another 53 billion tonnes of greenhouse gases in a year and then making no progress in climate negotiations is backsliding.
cc @michaelemann.bsky.social
One thing that's working in the Dutch energy transition (although further development of wind and solar is now slowing down). And we're not far from seeing this happen globally either.
November 23, 2025 at 9:22 AM
One thing that's working in the Dutch energy transition (although further development of wind and solar is now slowing down). And we're not far from seeing this happen globally either.
Hello, anybody home?
November 22, 2025 at 3:21 PM
Hello, anybody home?
Volledige focus op Piggy's Palace weer!
November 22, 2025 at 7:05 AM
Volledige focus op Piggy's Palace weer!
A century of glaciers melting, condensed into a few seconds. Impressive video: www.instagram.com/reel/DQWfDRe...
November 20, 2025 at 8:50 PM
A century of glaciers melting, condensed into a few seconds. Impressive video: www.instagram.com/reel/DQWfDRe...