As you're "asking Lemmy", I think the most Lemmy-like option is to set up a sort of paved guillotining area to be used to execute billionaires.

Once they've been culled to an appropriate level, they can be composted down into good soil.

Then you can rip up all the paving and deinstall the guillotine(s), then plant your moss/wildflowers/veg/local plants/bee-friendly plants etc.