A soil-science revolution upends plans to fight climate change
There is one way of storing carbon in the soil for the long term: biochar[0].  Biochar is organic matter heated anaerobically (pyrolysis) until it turns into something like charcoal.  Biochar is stable for a long time.  You can then bury that in the soil... it seems to improve the soil by providing surface area for soil micro-organisms and to store nutrients.  This could be done on a very large scale, and pyrolysis can actually be energy positive because you can burn the hydrogen that's released to perform the pyrolysis and still have energy left over.This may be one of our best options, and we should accelerate more research in that area.[0] https://en.wikipedia.org/wiki/Biochar