41–50 of 93 posts
Earlier quoted context omitted.
>Plant a tree. How does it compare to what they offer? (as in, metrics please).
About half the mass of a tree is carbon. Seeds cost a couple cents. Plant a big tree (oak, let’s say) in an area where it’s unlikely to burn down and it’s probably good for 1000kg of carbon storage. Comes with a lot of other benefits too.
https://twitter.com/bascule/status/1234493080583143424?s=20
Bitcoin energy consumption hits a new all time high of nearly 9GW, comparable to Chile, a country with 18M people. Carbon footprint is ~37 Mt CO2 annually, about that of New Zealand. And yet it still does ~4 transactions per second...
Plant a tree.
If I calculate that right, it is about $1100 a ton. I just gave a presentation on BECCS w/ Brazilian Ethanol which comes out closer to $30. I haven't put it up, but here is one of the papers I based it on https://www.sciencedirect.com/science/article/pii/S030626191...
However, this is a very different product than BECCS - it direct air capture (DAC) of CO2 which would not occur without your purchase, in the only real permanent operating storage facility we currently have. It is very difficult to know what the marginal impact of changes in sugarcane production are, though we do know that there is potential for either indirect land use change, or mitigation of reduction due to shifts in demand/supply and knock-on effects.
[0] https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3
If I calculate that right, it is about $1100 a ton. I just gave a presentation on BECCS w/ Brazilian Ethanol which comes out closer to $30. I haven't put it up, but here is one of the papers I based it on https://www.sciencedirect.com/science/article/pii/S030626191...
As of eight months ago, it was about $500-600: > https://www.digitaltrends.com/cool-tech/climeworks-carbon-ca...
Earlier quoted context omitted.
>Plant a tree. How does it compare to what they offer? (as in, metrics please).
About half the mass of a tree is carbon. Seeds cost a couple cents. Plant a big tree (oak, let’s say) in an area where it’s unlikely to burn down and it’s probably good for 1000kg of carbon storage. Comes with a lot of other benefits too.
Can we destroy bitcoin first?? https://twitter.com/bascule/status/1234493080583143424?s=20 Bitcoin energy consumption hits a new all time high of nearly 9GW, comparable to Chile, a country with 18M people. Carbon footprint is ~37 Mt CO2 annually, about that of New Zealand. And yet it still does ~4 transactions per second...
Plant a tree.
They have a nice graph on this page describing the problematic nature of that comment: https://climeworks.shop/how-it-works/ EG the land area + fresh water cost to support a similar revmoval of C02 through forestation is an untenable strategy
Cut them down and make buildings out of them, land area problem solved. The fresh water cost I don't buy, there's rain man, it's free.
If I've calculated correctly, this service costs $1100 per ton. A flight from New York to London emits about 1 ton of co2. The site talks about averages, but averages can be deceiving. Most people don't fly, and those that fly fly a lot. If you fly, you should probably try to overshot the average (by a lot) when you offset.
I flew from UK to Canada recently, and KLM was offering to "offset my CO2 emissions" for something stupid like $5. Surely....that's not actually a thing? What can they do for $5 that would offset so much CO2?
The differentiating factor of this service is that it's "Permanent: turn CO2 into stone". That benefit is mostly psychological, not pragmatic. Aside from that, the 'small land and water usage' metric is also biased. Yes, rainforest protection projects use land, and you know what else they do? Protect rainforests!
It's also not that promising as a CCS technology. Just like energy, CO2 is most efficiently captured where its concentration is highest - that is in power plants, steelmaking plants, etc.
I know we love revolutionary startups and shiny new things here, but there are scientific bodies and certification standards which have already done the work well in this space, looking at the problem with a holistic approach and with numbers.
I know people mean well here, but for climate change what matters is results, not intentions - so run the numbers before you throw your money out of the window. Cool startup branding is not what makes a project impactful.