Hacker News Reader

Crushing and distributing the required amount of rock seems challenging. Unless crushed rock is really produced enough by mining and is somehow really cheap to move (eg trains are coming back empty anyway)? It probably also adds another trip around the field for the combines?

Still, if it's this easy we really need to be doing this.

View on HN

The article does point out that the folks who studied this accounted for the carbon cost of doing that in estimating the capture benefits.

Yes, crushing and distributing is one of the main drawbacks. Too far from a mine and the net emissions are positive.

It sounds like the potential of this technology is enormous so i would guess the distance would have to be very long before the emissions vaccine bet positive. Also there might be ways to combat that.

Our fastest carbon sequestration method that scales are forests right now and they are slow to grow and need dedicated space. So let's build those EV combines or whatever it takes to keep rock dust net negative.

Reply on news.ycombinator.com