https://news.ycombinator.com/item?id=38187573 https://news.ycombinator.com/item?id=38187573 Because it doesn't scale, at least for the purposes of removing CO2

https://news.ycombinator.com/item?id=38187573 https://news.ycombinator.com/item?id=38187573 Because it doesn't scale, at least for the purposes of removing CO2 from the atmosphere.