David Ho @_david_ho_ Twitter profile

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David Ho

1 year

🧵Among other places, this tweet has been cited in a @TEDTalks , an @theAGU presentation, and a @FullyChargedShw episode about CDR. Now there’s a legit way to cite it in @Nature . 1/2

David Ho

@_david_ho_

2 years

1️⃣ It's hard for people to visualize removing tons or billions of tons of CO₂. What if we talked about CO₂ removal (CDR) like a time machine (e.g., this machine will take us back 5 minutes*)? *ignoring the hysteresis in the relationship between CO₂ and climate change impacts.

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David Ho

@_david_ho_

1 year

TBH, this seems worse than having the road blocked by climate activists for a few minutes.

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David Ho

@_david_ho_

2 months

Literally this.

Barrett O'Neill

@barrettjoneill

3 months

Ignore this at your own risk. Do not put your family in a small car. Yesterday, my wife was driving my son to school and an oncoming delivery truck crossed the center lane and hit her head on — the driver had a seizure was going 40 mph. I was on my way to work in a separate…

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David Ho

@_david_ho_

2 years

The beds on these two trucks are roughly the same size.

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David Ho

@_david_ho_

22 days

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

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David Ho

@_david_ho_

10 months

Behold my favorite traffic calming device.

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David Ho

@_david_ho_

9 months

🔥 🐸

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David Ho

@_david_ho_

1 year

At this point, maybe we should ask women for help. #COP27

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David Ho

@_david_ho_

2 years

Twitter laid me off today. If you know of any open positions for project managers or senior software engineers, let me know. I was in charge of the feature that made sure every time you tweeted about climate change you were served a fossil fuel ad.

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David Ho

@_david_ho_

1 year

In case you don’t believe the same equations govern motion in the atmosphere and the ocean.

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David Ho

@_david_ho_

2 years

Academia is full of people who say that the current system sucks and then they get into positions of power and prove it.

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David Ho

@_david_ho_

1 month

bp

@bp_plc

1 month

We’re working to bring more lower carbon energy to the UK – like hydrogen. And, we’re keeping oil & gas flowing to help meet today’s energy needs. And, not or – that's our approach.

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David Ho

@_david_ho_

1 year

TBH, this seems worse than having the road blocked by climate activists for a few minutes.

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David Ho

@_david_ho_

3 years

I have a PhD and I still don't know whether "bimonthly" means "twice a month" or "once every two months".

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David Ho

@_david_ho_

5 months

Climate deniers be like…

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David Ho

@_david_ho_

2 years

Everyone who works at a public university in the U.S. knows that the struggle is real. #DontLookUp

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David Ho

@_david_ho_

1 year

Stop using plastic straws.

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David Ho

@_david_ho_

1 year

I showed my students this movie of how atmospheric CO₂ travels around the globe and you should see it too.

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David Ho

@_david_ho_

10 months

Think about how close these people in motor vehicles are allowed to drive at speed next to people on foot, on bicycles, and in wheelchairs when they have no idea where the boundaries of their vehicles are.

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David Ho

@_david_ho_

2 years

200 km should be a train trip.

ian bremmer

@ianbremmer

2 years

air canada just bought a fleet of 30 electric planes that can fly 200km in all-electric mode extremely cool

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David Ho

@_david_ho_

1 year

How can we get Elon Musk to buy Elsevier?

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David Ho

@_david_ho_

9 months

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.

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David Ho

@_david_ho_

1 year

Too soon?

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David Ho

@_david_ho_

3 years

I'm surprisingly proud that President Biden's lead Secret Service guy is Asian American. #InaugurationDay

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David Ho

@_david_ho_

11 months

This is not normal.

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David Ho

@_david_ho_

2 years

Men deciding what women can do with their bodies is as crazy as people who’ll be dead in 30 years deciding what Earth’s climate should look like in 2050.

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David Ho

@_david_ho_

3 years

Too soon?

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David Ho

@_david_ho_

1 year

These climate activists are really causing havoc by blocking traffic.

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David Ho

@_david_ho_

2 years

I’ve got an idea 🙋🏻‍♂️

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David Ho

@_david_ho_

12 days

I don’t think climate deniers appreciate how much energy it takes to warm the Earth by 1°C.

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David Ho

@_david_ho_

10 months

Sometimes the bollards take souvenirs.

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David Ho

@_david_ho_

1 year

What people think oceanographers do at work.

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David Ho

@_david_ho_

1 year

I talked to a city traffic engineer and it turns out one of the reasons we don’t have real protected bike lanes is because drivers don’t like it when they hit concrete barriers and damage their cars so cyclists are left with plastic sticks and paint for protection.

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David Ho

@_david_ho_

2 years

Nothing personal against people who drive big vehicles, except this person who parked next to my rental car in FL.

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David Ho

@_david_ho_

2 years

Did CO₂ write this?

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David Ho

@_david_ho_

2 years

This line from #DontLookUp perfectly encapsulates what is special about Earth, and why we should fight for it. Evolution of intelligent life requires a planet that’s continuously habitable for 3 or 4 billion years. That such a planet exists is a miracle.

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David Ho

@_david_ho_

11 months

Lol. Wait till they find out about climate change.

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David Ho

@_david_ho_

11 months

Sometimes I doubt capitalism can solve climate change.

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David Ho

@_david_ho_

2 years

Explain to me like I'm 10 years old: If a CO₂ removal (CDR) technology is so energy intensive that it requires renewable energy to be effective, why isn't it better to use that renewable energy to replace fossil fuels before we're at net zero?

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David Ho

@_david_ho_

1 year

The outcome of #COP27 would be very different if attendance were limited to only those who will be alive in 2050.

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David Ho

@_david_ho_

1 year

The average American emits more CO₂ in one week than an average person in low-income countries does in one year.

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David Ho

@_david_ho_

1 year

In light of the paper from @GeoffreySupran @rahmstorf @NaomiOreskes showing that Exxon predicted global warming extremely accurately between 1977 and 2003, this exchange between @AOC and Exxon scientists is worth revisiting.

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David Ho

@_david_ho_

2 years

People like small pickup trucks? Wait till y'all find out about kei trucks. Check out this old article from @HirokoTabuchi .

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David Ho

@_david_ho_

10 months

Breaking: Activist from Just Stop Oil sprayed orange paint on Mexican oil company Pemex’s offshore platform Nohoch-A in the Gulf of Mexico. Oh wait, I’m told it’s an explosion and fire.

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David Ho

@_david_ho_

2 years

#COP26

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David Ho

@_david_ho_

7 months

Almost all carbon offset projects are junk.

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David Ho

@_david_ho_

2 years

What if we limited future COP attendance to only those who will be alive in 2050?

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David Ho

@_david_ho_

9 months

Haha. This is the end stage of capitalism.

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David Ho

@_david_ho_

11 months

Did CO₂ write this?

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David Ho

@_david_ho_

2 years

Peat — it’s good for sequestering carbon, and enemy tanks*. *near Sumy, Ukraine

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David Ho

@_david_ho_

7 months

This seems bad…

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David Ho

@_david_ho_

2 years

I have a bunch of jokes about carbon offset projects. Most of them don't work.

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David Ho

@_david_ho_

1 year

A gentle reminder that if we missing the 1.5°C target (and we will), the next target is 1.51°C and not 2°C.

The Economist

@TheEconomist

1 year

Global warming cannot be limited to 1.5°C. A dose of realism is needed at COP27, where three hard truths must be faced:

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David Ho

@_david_ho_

9 months

People associate Hawaiʻi with tropical conditions but rainfall has been decreasing for decades because of climate change, drying out the lush landscape and making it increasingly susceptible to wildfire damage.

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David Ho

@_david_ho_

5 months

It's absurd that people are traveling to COP28 by private jet.

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David Ho

@_david_ho_

1 year

Everyone got the memo that we're supposed to reduce our emissions by half in 7 years, right?

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David Ho

@_david_ho_

10 months

City planners should start planting lots of trees because we’re gonna need more shade.

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David Ho

@_david_ho_

1 year

Climate is what you expect, weather is what gets you.

Rebecca Weidmo Uvell

@RebeccaWUvell

1 year

@_david_ho_ Looks like weather

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David Ho

@_david_ho_

10 months

I’m putting this on my CV.

World Bollard Association™

@WorldBollard

10 months

We can almost smell the fear as these brave car’s approach… #WorldBollardAssociation 🎥 @_david_ho_

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David Ho

@_david_ho_

1 year

France has been given the green light to ban short haul domestic flights. They can do this because the trains are so good. Also, they aim to get 9% of the population on bicycles by 2024 (up from 3%; the Netherlands is at 27%).

Short-haul flights are now banned in France thanks to new law

The idea for the ban originally came from a Citizens' Assembly.

www.euronews.com

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David Ho

@_david_ho_

5 months

This is 100% untrue.

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David Ho

@_david_ho_

1 year

Imagine climate impacts at 3°C…

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David Ho

@_david_ho_

1 year

Potentially unpopular opinion: Solving climate change is the moonshot of our time and we should focus more on that and less on going to the moon (again).

NASA

@NASA

1 year

We are going. For the first time, the @NASA_SLS rocket and @NASA_Orion fly together. #Artemis I begins a new chapter in human lunar exploration.

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David Ho

@_david_ho_

10 months

Apparently we don’t need any women in order “to understand the true nature of the universe.”

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David Ho

@_david_ho_

2 years

Those of you asking why fossil fuels need advertising: Hey, oil, gas, and coal aren’t gonna greenwash themselves.

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David Ho

@_david_ho_

1 month

In Bergen, Norway, there are no garbage trucks and no trash piling up on streets because all over town, there are receptacles that connect to an UNDERGROUND PNEUMATIC WASTE TRANSPORT SYSTEM. The waste collects for a bit, and then WHOOSH...it's off to the recycling center. 🤯

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David Ho

@_david_ho_

10 months

@d_gershenson It’s the width of a normal car + a few tens of cm on each side.

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David Ho

@_david_ho_

10 months

@w_s_bitcoin I've driven in Boston; some of the worst drivers ever.

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David Ho

@_david_ho_

21 days

@jtemple

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David Ho

@_david_ho_

7 months

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.

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David Ho

@_david_ho_

2 years

Decided to see how much of world total energy supply was still from fossil fuels and wish I hadn't. In nearly half a century, we decreased from 86.7% in 1971 to 80.9% in 2019. Data from:

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David Ho

@_david_ho_

2 years

I used to think I was Calvin, but I think I’ve become the Dad.

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David Ho

@_david_ho_

2 years

Removing a million tonne of CO₂ per year is a time machine that takes us back 13.5 minutes each year. 🙃

Ella Nilsen

@ella_nilsen

2 years

Scoop: DOE is announcing a massive investment in 4 direct air capture hubs. When built, each should be capable of removing over a million tons of CO2 per year (removing 1 million ton of CO2 is like taking ~200k gas cars off the road).

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David Ho

@_david_ho_

4 months

“More than half the CO₂ emissions of the industrial age have been dumped into the atmosphere since you were born.”

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David Ho

@_david_ho_

1 year

Q: What do cars and bicycles have in common? A: They both like to be in bike lanes.

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David Ho

@_david_ho_

1 year

Large electric vehicles produce just as much emissions as smaller gasoline-powered cars (plus they kill more people).

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David Ho

@_david_ho_

22 days

You’re not closing the street to cars, you’re opening it to people.

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David Ho

@_david_ho_

6 months

How could Twitter cost US$44 billion when the entire app fits on my phone!

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David Ho

@_david_ho_

8 months

This is not normal for Hong Kong.

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David Ho

@_david_ho_

8 months

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.

Glen Peters

@Peters_Glen

9 months

According to the #IPCC AR6 Synthesis Report, to limit global warming to '1.5°C with no or limited overshoot', then global CO2 emissions decline: * 48% in 6 years * 80% in 14 years * 99% in 24 years (thanks @_david_ho_ for reminding me to remind people)

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David Ho

@_david_ho_

2 months

“Sorry”

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David Ho

@_david_ho_

2 years

I’m not a doomer but it feels like we’re pretty far to the right side already.

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David Ho

@_david_ho_

1 year

What if fixing climate doesn't mean doing everything the same way, except with less CO₂ emissions, but fundamentally changing the way we interact with nature and with other people?

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David Ho

@_david_ho_

13 days

Imagine how scary it’d be if we didn’t know why global temperatures were rising. #420day

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David Ho

@_david_ho_

10 months

The climate deniers who claim that climate scientists are in it for the grant money should be forced to write and submit 10 proposals as punishment.

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David Ho

@_david_ho_

2 years

When I hear people say that we should use the ocean for CO₂ removal (CDR) because it's so big, I wanna scream that it's already removing 10,200,000,000 tonnes more CO₂ than it did before the industrial revolution!

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David Ho

@_david_ho_

11 months

Ocean Biogeochemists have something to say about this, but only after they’re done screaming into their pillows.

Tomas Pueyo

@tomaspueyo

11 months

What if we could: • Sequester CO2 • Create more life • Reclaim huge pastures and turn them back into forests • Increase healthy food production • Grow the economy • And make money along the way? How? By filling ocean deserts with life:

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David Ho

@_david_ho_

4 months

The IPCC should hire the BBC’s graphics team for AR7.

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David Ho

@_david_ho_

1 year

The opposite of fossil fuels burning is not carbon dioxide removal (CDR); it’s stopping the burning of fossil fuels.

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David Ho

@_david_ho_

8 months

To those claiming that climate scientists are perpetrating a hoax to get rich off grant money, let me tell you about fossil fuel subsidies…

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David Ho

@_david_ho_

11 months

Sometimes I feel like we don’t evaluate things using the correct metric.

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David Ho

@_david_ho_

8 months

Does it even matter where this is anymore?

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David Ho

@_david_ho_

6 months

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David Ho

@_david_ho_

1 month

It's “ocean”, not “oceans”. Thank you for coming to my TED Talk.

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David Ho

@_david_ho_

5 months

It's super depressing that bad news about climate change is like, "Omg, everything is gonna die," and the good news is like, "In paragraph 28d, COP finally acknowledged that fossil fuels exist."

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David Ho

@_david_ho_

2 years

Carbon capture and sequestration (CCS) in action.

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David Ho

@_david_ho_

2 years

Maybe unpopular opinion, but Stanford doesn’t need more money. I’d like to see someone give $1.1 billion to state universities and HBCUs to study climate change.

Stanford Gets $1.1 Billion for New Climate School From John Doerr (Gift Article)

The billionaire venture capitalist said the study of climate change and sustainability would be the “new computer science.”

www.nytimes.com

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David Ho

@_david_ho_

3 years

All of us are stressed and having a hard time, but at least we're not dealing with this. "When you have public figures like [former Trump advisor Steve] Bannon calling for your beheading, that's really kind of unusual." – Anthony Fauci

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David Ho

@_david_ho_

2 years

People working on CO₂ removal (CDR), are we all on the same page that when you remove atmospheric CO₂, the ocean and land will outgas and equilibrate with the new atmosphere so that, for example, you’d have to remove 2 GtC from the atmosphere to achieve a reduction of 1 GtC?

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David Ho

@_david_ho_

1 year

Cars ruin cities.

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