Just collect the roots and compress them to a density that will NOT float and dump the root cubes into the Mariana Trench.
Or throw them into a strip mine or oil well seal it up. Not like we don’t have a ton of giant holes in our ground after a century of fossil fuel extraction.
Or throw them into a strip mine or oil well seal it up. Not like we don’t have a ton of giant holes in our ground after a century of fossil fuel extraction.
I would be worried about seepage into and out of those holes, but I suppose it is unlikely to turn into something toxic…