Take a look at the comments in <a href="https://news.ycombinator.com/item?id=20910845" rel="nofollow">https://news.ycombinator.com/item?id=20910845</a> (36 points, 52 days ago, 19 comments), the comments may be relevant.<p>> <i>making the planet great by removing the carbon from the soil.</i><p>This is a typo or a very bad idea? It's better to add carbon to the soil so it is not in the air.