Post AaPIHgAIDXKvjDKVZw by tiotasram@kolektiva.social
(DIR) More posts by tiotasram@kolektiva.social
(DIR) Post #AQcpVFrJ8QZuTnUvbc by davidho@mastodon.world
2022-12-14T11:17:04Z
0 likes, 8 repeats
It's hard for people to visualize removing tons or billions of tons of #carbon #dioxide (CO₂). I propose we talked 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.
(DIR) Post #AVv7ePdrf4eSTBKu6y by davidho@mastodon.world
2022-12-15T09:55:18Z
2 likes, 1 repeats
Another CO₂ removal (CDR) as time machine example:H&M, the second largest international clothing retailer, recently purchased 10,000 tonnes of CO₂ removal from Climeworks. 10,000 tonnes sounds like a lot, right, but it's a time machine that takes us back only 8 seconds. 😩https://hmgroup.com/news/hm-group-further-invests-in-the-decarbonisation-of-its-value-chain/
(DIR) Post #AVv7eQWoMmbVDb2mky by davidho@mastodon.world
2022-12-16T12:16:19Z
1 likes, 1 repeats
My #CDR friends on twitter got mad at me for pointing out that the four regional Direct Air Capture (#DAC) Hubs under the Inflation Reduction Act (#IRA) specify a minimum CO₂ removal capacity of 50,000 tonnes/year.Hence, each DAC Hub is a #time #machine that takes us back only about 40 seconds a year!It's important to point this out because some people think CDR is a replacement for #decarbonization and that can never be the case.https://www.energy.gov/oced/four-regional-clean-direct-air-capture-hubs
(DIR) Post #AVvzSUpVwTtcbqYHwW by davidho@mastodon.world
2023-05-23T02:23:35Z
0 likes, 1 repeats
I used the CO₂ removal (CDR) as time machine analogy to argue that while we need to research and develop CDR because it’s needed in the future, CDR is useless as a climate solution until we decarbonize drastically.https://rdcu.be/dbFbB
(DIR) Post #AaPIEFxBDMsfZ9Z2hs by earthworm@kolektiva.social
2023-05-13T07:44:09Z
1 likes, 1 repeats
@davidho Technological CDR is a total scam...Every dollar invested and every minute wasted discussing it just removes resources from the most meaningful and effective we can do: stop burning the planet for a few bucks for people that are already so rich they can't spend their wealth in lifetime.There are several mechanisms why CDR receives so much more funding than reasonable actions:- CDR doesn't touch the status quo- the easiest thing for governments is to spend money instead of forcing people/companies to actually change behaviour- scientists/engineering enthusiasts like the idea of a technology to 'save the world'- there are plenty of business opportunities and money to makeWith 'green CDR' the things might be a little bit different, especially when these initiatives involve a bottom-up improvement of livelihoods of the people. I am not referring to industrialized afforestation projects (!), like the ones usually offered by most offsetting companied, but to initiatives like https://www.evergreening.org/Or improvements of agricultural techniques benefitting resilience, biodiversity and soil organic matter contents.
(DIR) Post #AaPIF6Br03W3ZipUnY by pineconeclare@mastodonapp.uk
2022-12-14T19:03:46Z
1 likes, 0 repeats
@davidho That not the whole story though - trees also give us oxygen, regulate temperatures by up to 10 degrees, create atmospheric moisture and support untold biodiversity networks. 10 million more would start to help a lot. 100 million more even more so, especially in 20 years time. Best time to plant a tree 20 years ago, second best time today. They are no substitute for slashing carbon emissions though - that’s up to us.
(DIR) Post #AaPIHgAIDXKvjDKVZw by tiotasram@kolektiva.social
2023-05-13T11:54:24Z
1 likes, 0 repeats
@pineconeclare @davidho the problem with "planting trees" as a concept is that even if you don't plant trees, they will still grow. Anywhere that a tree wild naturally survive for a couple of decades, if you just leave that space alone trees will grow by themselves. So the marginal impact of "planting trees" is mostly nil. Actually changing land use from things like grazing to forest certainly has good impacts, but that's not what most "plant a tree" initiatives are doing.
(DIR) Post #AjvqDcOtlccjRFYb6u by ampanmdagaba@sigmoid.social
2022-12-14T11:56:30Z
0 likes, 0 repeats
@davidho OMG. What a number!I actually need some effort to conceptualize this #number as well!So 100 million is 1e8. It's a square, 10k #trees by 10k. Assuming a #pine plantation with ~2 m between trees, it's 20x20km of pines. A HUGE one!And assuming that we then chop them all down and hide them in a mine, to sequester #carbon, it's some 30 years of growth = (by your calculation) 15 hours of #co2 release at a current rate? Not even a full day! omfg.
(DIR) Post #AjvqDddTAvsDGjNkSe by bonifartius@qoto.org
2024-07-14T20:10:57Z
1 likes, 0 repeats
@ampanmdagaba @davidho ok, we emit 37 040 000 000 tonnes CO2 yearly (37.04 billion tonnes).given your numbers i come up with a forest of about 2434km edge length:> puts [ expr sqrt((37040000000 / 2500000.0) * (20 * 20)) ]2434.4198487524704restore mother europe to be a continuous forest as she has been. let's go.
(DIR) Post #AjvqVh7cx3t3IJ68K8 by Elf@breastmilk.club
2024-07-14T20:14:15.334943Z
0 likes, 0 repeats
@bonifartius @ampanmdagaba @davidho You could do this even more effectively by restoring Australia’s Eucalyptus Regnans groves. Each tree can grow to 90 meters tall, at a rate of 2 meters per year, culminating in tens of tons of sequestered carbon. Whilst also flowering, providing habitat and nourishment for millions of living things.
(DIR) Post #AjvrTALxuj6h2TA93Y by iron_bug@friendica.ironbug.org
2024-07-14T20:24:50Z
0 likes, 0 repeats
the most CO2 is processed in the ocean.