davidho

davidho, 18 days ago to random

TIL that Royal Mail is privately owned. This seems incredibly stupid.

https://www.bbc.co.uk/news/articles/c4nn0n93zj4o

davidho, 18 days ago to random

"The city of Alameda has ordered the University of Washington to halt a controversial marine cloud brightening experiment on the USS Hornet — a decommissioned aircraft carrier and connected museum — citing health and environmental safety concerns."

https://www.sfchronicle.com/climate/article/geoengineering-alameda-study-stopped-19453924.php

davidho, 18 days ago to Futurology

“The global press recently warned that as early as June 2024, Mexico City, home to 22 million people, could face ‘Day Zero’—the complete loss of fresh #water at the taps. The situation on the ground, although dire, is more nuanced.”

https://www.scientificamerican.com/article/0424--kinard-mexico-city-run-out-of-water/

davidho, 19 days ago to random

100% would drive this.

davidho, 19 days ago to random

If atmospheric CO₂ is 420 ppm, and direct air capture (DAC) is 50% efficient, we'd have to filter 0.63% of the volume of the atmosphere to remove 10 GtCO₂.

That’s a lot of air!

How will that affect microbial ecosystems worldwide?

https://academic.oup.com/ismej/advance-article/doi/10.1093/ismejo/wrae092/7683485

davidho, 19 days ago to random

“Small” and “dumpy” seem unnecessarily mean.

davidho, 19 days ago to random

The horror! The horror!

davidho, 19 days ago to random

Do people who are not oceanographers know that elephant seals have been helping us collect temperature and salinity data in inhospitable areas of the ocean for the last 20 years?

davidho, 19 days ago to random

Why plagiarize when there’s AI?

davidho, 19 days ago to random

Welsh is just a cat walking across a keyboard. 🙃

davidho, 20 days ago to random

Does knowing that hydrogen and helium are the only gases that heat up when they leak, whereas other gases cool down, change people’s minds about using hydrogen widely?

davidho, 20 days ago (edited 20 days ago) to Hydrogen

Honest question: I measure gases as a career, and I’m always fixing leaks in my instruments*. How do people who push #hydrogen as a home heating solution propose to avoid catastrophic leaks?

*I use Swagelok fittings, the same ones used on airplanes and in industrial settings.

davidho, 20 days ago to random

What is the raison d'etre of raisins?

davidho, 21 days ago to random

People who talk about an “EV bubble” should know that decarbonization of the transport sector will happen no matter what we do. So we could choose to do it on our own terms or let air pollution from ICEs kill a lot more people and then have to switch to EVs when the world runs out of oil.

davidho, 21 days ago to random

If we want to make the energy transition equitable, public charging for EVs should cost the same as home charging. In the UK, public charging is more expensive because VAT for home changing is 5%, while VAT for public charging is 20%.

https://electroverse.octopus.energy/community/ev-blogs-and-guides/why-is-public-charging-more-expensive-than-home-charging#

davidho, 21 days ago to random

Lamppost EV chargers are the answer to how you charge your vehicle in cities.

This is possible because when energy intensive street lamps were replaced by LEDs, there’s excess power for charging EVs.

All cities should do this. ⚡️

h/t Robert Llewllyn

davidho, 21 days ago to random

Never underestimate the role of cuteness in accelerating decarbonization. Octopus Energy shows how it’s done.

davidho, 22 days ago to random

One thing we don’t talk about enough is how good bicycle lights have gotten, thanks to LEDs and Li-ion batteries. 🔋

davidho, 22 days ago to random

This thing where they don’t tell you what platform your train is on until the last minute is one of the dumbest parts about taking a train.

davidho, 23 days ago to random

#Greenwashing

davidho, 24 days ago to random

The fact that “alternative transportation” just means you’re not in a car tells you everything that’s wrong with our transportation system.