Carbon removal finalists - what went wrong 2

Number 8 ARTI - Land

This has potential to do something. They are a container sized Takachar machine. The also sell machines but at least they also sell the carbon that they produce. Unfortunately, like Takachar, it is a bit hard to verify where the ink on your paper ended up.

Aspiring Materials - Rock.
Looks pretty good. A bit vague, but using ovalene is known to work so a reasonable choice.

Bamcor - Land
Bamboo houses again. In terms of efficiency, a house is mostly empty space, so its isn’t very efficient in terms of where you are ‘storing’ the CO2 you sequester. Unless you offset the concrete emissions - but wait, no offsetting. And the Fire of London is a great example of rereleased emissions from wood use in building construction on a large scale.

BeyondAC - AIR.
Electrochemical carbon capture. Not much to say - 400ppm of CO2 in the Air means that you need a lot of air to get 1000 tonnes of CO2, and that is a lot of electricity. Might work, but scalable?

BioCapture - Land
Grow plants for biochar. OK, biochar is sensible as an idea. But it is a farm, probably a bamboo farm, but it does meet the criteria. Anyone thought about how much bamboo you need for 1000 tonnes of CO2e?

BioChar Challenge
Burn an invasive species in Nambia for biochar. Sounds good, but I guess it must be an invasive species farm or it wont be sustainable…

A big name for another biochar solution. The big problem with biochar, is where is the money. It still costs money for farming, collection, distribution. So I guess they sell it…except there isn’t really a market for it at scale.

So that is the next 7 of our top 60 solutions to save the planet. Well at least Bamboo houses float.