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0 pointsThorrez4y ago0 comments

It looks like they've considered that:

>Their model also incorporated the emissions costs of mining and then spreading this powdered rock over fields.

Of course, there's always a chance of errors in both how they estimated these emissions and how they estimated the amount of CO2 that will be removed.

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ambrose24y ago

> Transportation. Detailed transport analyses (based on UK road and rail networks) were undertaken to calculate distance costs and CO2 emissions for the distribution of rock dust from source areas to croplands. We used the GLiM database for the UK distribution of basalt deposits and the 2019 land cover map (Supplementary Information) to calculate transportation distances, cost (£ t−1 rock dust km−1) and emissions (tCO2 km−1) from potential local rock sources to cropland areas, together with UK road and rail transport networks. Spatial analysis was undertaken with least-cost path algorithms from the ArcGIS software.

Yea, it sounds like the model took this into the account, maybe the assumption that rock sourcing could rely on mines within the UK. If so, given the size of the UK, if the majority of transportation is by train and EV over UK distances, this might not be an issue.

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