Surprising but true: in 2025, all net new electricity generation added worldwide was clean, ie non greenhouse gas emitting. 99% was renewable! 75% solar, 24% wind.

It was actually over 100% total. We added 849 TWh of generation overall in 2025, an increase of 4.5%, but GHG emitting (ie fossil fuel) generation shrank by 0.2%. Clean energy covered the gap and then some.

Even more surprising: this was true for China and India individually too. All of their net new generation added in 2025, and more, was non-emitting.

China’s overall generation grew by 5%, but its fossil fuel output fell 0.9%. Its electricity emissions have been flat for two years now. India’s generation grew 2.4%; its fossil generation fell 3.3%!

There’s plenty of bad news on the climate crisis. There’s lots of fear-mongering on energy etc, as always. But there’s more good news, and progress, than we realize.

Much of my career boils down to:

All code is liability. Minimize it.

Feedback loops are everywhere. Speed them up; do them more.

We’re bad at predicting the future. Avoid it.

More tests.

Hire smart, motivated people, then get out of their way.

Find the right thing to turn off and on again.

Huge, and surprising, and important: dementia is down by almost half over the last 40-50y!

(Also reconfirms that amyloid beta was largely a red herring, APOE4 is real, and – news to me – the shingles vaccine seems preventative!)

every packet is an adventure

TIL: “valley-free” routing

Jasper National Park, Canadian Rockies

taking a vacation? forgot which day of the week it is? don’t worry, hotel elevator’s got you

Real-time animated dashboard of SF water and sewage flow at SFPUC  headquarters.