davidho

davidho, 1 year ago (edited 8 months ago) to random

It's hard for people to visualize removing tons or billions of tons of carbon dioxide (CO₂). I propose we talk about CO₂ removal (#CDR) like a time machine (e.g., this machine will take us back 5 minutes). For example:

Q: How far back in time does planting 100 million trees take us?

A: If one mature tree takes up an average of 25 kg of CO₂ per year, then 100 million trees will take up 2.5 MtCO₂. That's a time machine that takes us back 33 minutes and 6 seconds in a year. It's not a lot.

davidho, 10 months ago (edited 6 months ago) to random

Behold my favorite #traffic calming device.

davidho, 9 months ago to random

Even if CO₂ emissions decreased annually as much as during the pandemic lockdown, we wouldn't achieve our climate targets.

While individuals made huge sacrifices, the system remained. This shows that individual action will not solve climate change. We need the system to change.

davidho, 19 days ago to random

I find it weird that newspapers characterize students as being “pro-Palestinian” as opposed to anti whatever you call this.

davidho, 11 months ago to random

Lol. Wait till they find out about climate change.

davidho, 9 months ago to random

Back in 1985, Carl Sagan told Congress that continuing to burn fossil fuels will increase global temperature, cause climate change, melt glaciers and ice sheets, and cause sea level rise.

His solution: Fewer government subsidies for fossil fuels and use of renewable energy.

video/mp4

davidho, 9 months ago to random

Please don’t come.

Cancel your trip and donate the money to the Hawaii Community Foundation Maui Strong Fund instead.

https://www.hawaiicommunityfoundation.org/maui-strong

davidho, 5 months ago to transit

Admin freaks out every time I submit a #bike share receipt for $5, but they have no issues with $50 for taxis and $100 for rental cars because they see biking as recreation. We need to normalize #micromobility as #transportation.

davidho, 7 months ago to random

What is common knowledge in your field but shocks outsiders?

More than half the CO₂ emissions of the industrial age have been dumped into the atmosphere since 1990.

davidho, 1 month ago to random

I was at a conference and a speaker dismissed my question by saying that I should check out the work of David Ho. 😵‍💫

davidho, 4 months ago to random

If capitalism is so perfect, why do we have to give so many subsidies to corporations?

davidho, 2 months ago to random

“Sorry“

davidho, 1 year ago to random

If we priced externalities into the cost of fossil fuels, it’s not a profitable business.

The cleanup costs in California will be triple the industry’s projected profits, and that doesn’t even include cleaning up CO₂ and CH₄ from the atmosphere.

https://www.propublica.org/article/cost-of-california-oil-cleanup-exceeds-industry-profits

davidho, 7 months ago to random

At some point, we should ask how this enhances our lives.

davidho, 8 months ago to random

Anything that makes a city a worse place to drive makes it a better place to live… 👀

https://xkcd.com/2832/

davidho, 2 months ago to random

So we’re gonna shoot mirrors into space and put a 100 km-long underwater curtain in Antarctica before we ban private jets?

davidho, 2 months ago to random

Behold the longest tunnel specifically built for biking and walking.

Timelapse through a 3 km tunnel lit by different color lights in different sections

davidho, 1 month ago to random

I’m a bad person

davidho, 7 months ago to random

Mutual assured destruction is clearly the motivation for car buying these days.

Ultimately, we're all going to have cars that fire missiles.

davidho, 3 months ago to random

Pro tip: Bring your phone with you on a hike. That way, if you get lost, you can post on Mastodon and someone will invariably come up behind you and tell you how to write your alt text.

davidho, 7 months ago to random

This bonkers story about how a former DJ sold thousands of airplane engine components with bogus documentation that are installed in airplanes worldwide might be a good inspiration to fly less. 😬

https://www.bloomberg.com/news/features/2023-10-11/fake-parts-found-on-boeing-airbus-jets-plague-airlines

davidho, 7 months ago to random

It’s unfortunate (in a sense) that while temperatures were extreme this year (warmest in the instrumental record in many places), most of the US and Europe were spared so many will feel that this level of warming is no big deal.

Image from Robert Rohde

davidho, 10 months ago to random

When those of us who work on CO₂ removal (CDR) meet, it’s apparent that no one wants to do this and no one thinks it’s easy.

It’s far easier and cheaper to stop emitting CO₂.

The fact that some of the smartest people I know decide to work on CDR signals our desperation.

davidho, 4 months ago to random

We did this.

davidho, 9 months ago to random

Climate activists disrupting flights at Frankfurt airport.

Oh wait, I’m told it’s a flood.

video/mp4