@davidho@mastodon.world
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davidho

@davidho@mastodon.world

Climate scientist working on the ocean carbon cycle and verification of ocean carbon dioxide removal (CDR). Founder, Bamboo Bike Project; co-founder and Chief Science Officer at [C]Worthy. Professor at University of Hawaiʻi at Mānoa; also at Columbia University in NYC and École normale supérieure in Paris.

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davidho, to random
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Over its lifetime, #cement already removes ~43% of the CO₂ from its production through carbonation (currently ~1 GtCO₂/yr). So if CO₂ is injected into cement during production (i.e., lower carbon cement), is that considered additional carbon removal? 🤔

davidho, to london
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Hey #London, Santander Cycles is offering unlimited 30-minute rides for free on Sundays in June to celebrate the launch of #CycleSundays.

Just choose a Day Pass at a Santander bike terminal and use the code CYCLESUNDAYS!

davidho, to random
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I’m thinking about this insane crosswalk in Halifax.

davidho, to random
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Something I learned biking down C10 in London today: Low traffic neighborhoods (LTNs) are good.

davidho, to random
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Environmental protection is actually a good thing.

davidho,
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@loke Here you go!

davidho, to random
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Another advantage of bikes over cars: It takes much less water to wash a bike.

davidho, to random
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Happy #WorldOceansDay! What is your favorite ocean book?

davidho, to random
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I think about this quote from @georgemonbiot a lot:

“The idea that some people may freely poison others is one of the most astonishing but least contested aspects of modern life.”

https://www.theguardian.com/commentisfree/2023/sep/22/air-pollution-lobbying-politics-ulez

davidho, to random
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“I didn’t need a big child-crushing truck for this.”

davidho, to random
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“It’s really too bad, you know, we’re shooting missiles and rockets and whatnot at each other on this tiny little place we call home. It’s the only home in the universe for us humans. It’s too bad we don’t treat it a little better.” — Bill Anders

https://www.latimes.com/california/story/2024-06-07/bill-anders-astronaut-plane-crash

davidho, to random
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davidho, to random
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NOAA and DOE are two federal agencies that are funding our work on monitoring, reporting, and verification (MRV) of marine CO₂ removal (mCDR) at [C]Worthy. It’s great to see this coordination.

https://www.noaa.gov/news-release/noaa-doe-sign-agreement-to-advance-marine-carbon-dioxide-removal

davidho, to random
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Elected leaders in Alameda, Calif., voted early on Wednesday to stop scientists from testing a device that might one day be used to artificially cool the planet, overruling city staff members who had found the experiment posed no danger. 🤨

https://www.nytimes.com/2024/06/05/climate/alameda-cloud-brightening-geoengineering.html?unlocked_article_code=1.xk0.iaWh.YFC3BMPKYPzv&smid=nytcore-ios-share&referringSource=articleShare&sgrp=c-cb

davidho, to random
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Do lithium iron phosphate deep cycle batteries require a special charger or can I use a normal car battery charger?

davidho, to random
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TIL that in the 1940s, Idaho Fish and Game relocated beavers by dropping them into remote areas using parachutes.

davidho, to random
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Yesterday would have been the 80th Anniversary of D-Day, but oceanographers and our ability to make predictions called for a one-day delay. This ensured that the landings were a success. #WorldWarTwo

https://nautil.us/the-man-who-delayed-d-day-237811/

davidho, to random
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Ffs. They should ban all private cars in Manhattan.

https://abc7ny.com/post/congestion-pricing-nyc-kathy-hochul-start-delay/14912968/

davidho, to random
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Hot take: HTML is the worst thing to happen to email.

davidho, to random
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What if making progress on climate change 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?

davidho, to random
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We want to keep global temperature rise below 1.5°C because we don’t want to live in a dangerous world.

Then we say we need up to 10 billion tonnes of carbon dioxide removal (CDR) per year by 2050 because we’re not decarbonizing fast enough.

However, CDR is a limited resource, and we likely won’t be able to get to 10 billion tonnes a year.

If we don’t want to live in a dangerous world, the only parameter we can change is how quickly we decarbonize.

davidho, to random
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We got ninety-nine environmental problems but clouds in the sky ain’t one.

davidho, to random
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davidho, to random
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The kind of people who would modify their car’s exhaust to be louder also scored high on the “psychopathy and sadism” scale.

https://www.caranddriver.com/news/a60983144/study-loud-exhaust-psychotic/

davidho,
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