Viewing profile — cmutel

I'm an American living in Switzerland for over 10 years, and this was definitely my impression as well. But that isn't really the case anymore here - you can no longer have anonymo…

The Nordic countries are famous for pioneering low temperature district heating. This can be as low as 50 C. Sorry, no citation, this is what I heard at a project meeting on distri…

https://github.com/USEPA/

Aargau, normally considered higher tax, but we have four kids at home.

Since we're having the semi-annual "how do taxes work in other countries" thread, here is my experience as an American living in Switzerland. Though I have been here a while, I sti…

The official ISO shortname changed on Sept 28, 2016: https://www.iso.org/obp/ui/#iso:code:3166:CZ . Wikipedia has a good discussion: https://en.wikipedia.org/wiki/Name_of_the_Czech…

Sorry for being late to the game, but we have an as-open-as-it-can-be tool to compare petrol, gas, battery, and fuel cell cars, both today and in the future, available here: http:/…

Here is a series of three open access reviews covering the current literature (1000s of papers): 1: https://iopscience.iop.org/article/10.1088/1748-9326/aabf9b 2: https://iopscienc…

Yes, but the linked product/subscription also include deep injection, not just the capture.

You are right that this is very expensive. Other firms in this space estimate that there should be a lower bound for direct air capture of $100-200 per ton of CO2 [0]. However, thi…

Climeworks is a Swiss startup in business since 2003; they have built multiple pilot plants in Switzerland, and are well known here. See e.g. https://www.climeworks.com/about/

This is a reasonable place to start reading, they provide both summaries and detailed explanations of the science: https://www.ipcc.ch/report/ar5/syr/

Lithium prices have gone down almost 60% in the last year. Short-term storage isn't that bad, we have other battery chemistries or even completely different types (e.g. flow batter…

The process of making clinker uses heat to separate CaCO3 into CaO and CO2 [0]. This release of CO2 is normally about half the CO2 footprint of making concrete (the rest is mostly …

We looked into this with a completely open toolchain [0]. You could email either of the two first authors to get the code (not sure why it wasn't in the paper supporting informatio…

As far as I understand, current state-of-the-art is between $100-200 per ton CO2 (see https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3 ). This is from the CO2 capture comp…

Here is a whole (open access) journal issue on negative emission technologies: https://iopscience.iop.org/journal/1748-9326/page/Negative%2... Short summary: There is no free lunch…

In our research, we see that the easy alternatives are being used almost to capacity already, making future improvement difficult. For example, there is basically no unused fly ash…

There is a way :) Don't forget that each atom of carbon combines with two oxygens from the air.

It is not unclear how their method, they explain it quite clearly and in detail [0]. In general, you are correct that road and (especially) rail require substantially more infrastr…

The cited study is not peer reviewed, nor does it provide any supplementary data. Simply put, as it is not reproducible, it is not science. The best studies will be completely open…

I am part of a team building an RDF database to be used for environmental footprinting and industrial ecology ( https://github.com/BONSAMURAIS ), and am also slowly becoming part o…

The following open access publications give a broad overview of NETs: Part 1: Research landscape and synthesis: https://iopscience.iop.org/article/10.1088/1748-9326/aabf9b Part 2: …

I think you are right that Drawdown is doing good work, and trying to compare things that are quite difficult to compare. At the same point, the HN community should be aware that t…

The method to calculate there fact sheets (or environmental footprints) is called life cycle assessment, and has been trying to come up with labels for a long time. There have been…