https://www.sciencedirect.com/science/article/abs/pii/S1750583609000656 https://www.sciencedirect.com/science/article/abs/pii/S17505... Relevant: Qualitative

https://www.sciencedirect.com/science/article/abs/pii/S1750583609000656 https://www.sciencedirect.com/science/article/abs/pii/S17505... Relevant: Qualitative proposals to control atmospheric CO2 concentrations by spreading crushed olivine rock along the Earth's coastlines, thereby accelerating weathering reactions, are presently attracting considerable attention. This paper provides a critical evaluation of the concept, demonstrating quantitatively whether or not it can contribute significantly to CO2 sequestration. The feasibility of the concept depends on the rate of olivine dissolution, the sequestration capacity of the dominant reaction, and its CO2 footprint. Kinetics calculations show that offsetting 30% of worldwide 1990 CO2 emissions by beach weathering means distributing of 5.0 Gt of olivine per year. For mean seawater temperatures of 15–25 °C, olivine sand (300 μm grain size) takes 700–2100 years to reach the necessary steady state sequestration rate and is therefore of little practical value. To obtain useful, steady state CO2 uptake rates within 15–20 years requires grain sizes <10 μm. However, the preparation and movement of the required material poses major economic, infrastructural and public health questions. We conclude that coastal spreading of olivine is not a viable method of CO2 sequestration on the scale needed. The method certainly cannot replace CCS technologies as a means of controlling atmospheric CO2 concentrations. P.S. Counterpoint: This is from a preofessor in the Netherlands, 2016 He's giving lots of strategies, other than "Olivine all the things": http://arctic-news.blogspot.com/2016/07/olivine-weathering-t http://arctic-news.blogspot.com/2016/07/olivine-weathering-t... This is a whitepaper from that professor 2017: https://www.scirp.org/journal/paperinformation.aspx?paperid= https://www.scirp.org/journal/paperinformation.aspx?paperid=... His own summarized blogpost, where he is representing the "Olivine Foundation": https://smartstones.nl/the-rate-of-olivine-weathering-an-exp https://smartstones.nl/the-rate-of-olivine-weathering-an-exp... So I'm thinking this is probably a good foundation to start from. How long before someone can convince the US, much less China to olivine their fields? This is not a fake problem. It's a series of problems, but I concede that olivine is a good way to go.