(Still haven't got to read stuff on that, maybe I'll be more lucky next week. After five minutes by the clock thinking about the idea and its alternatives, have two results: 1) I think veeery slowly, 2) maybe it's possible to make a thin porous cable stuffed with enzyme analogue to download HM directly from the soil, collect them on electrodes once they are in, and extract massively in a special facility.)
a thin porous cable stuffed with enzyme analogue to download HM directly from the soil
To extract heavy metals from the soil you need a LOT of contact surface. Roots excel at this, cables, not so much.
Thus spake Eliezer:
It seems that many here might have outlandish ideas for ways of improving our lives. For instance, a recent post advocated installing really bright lights as a way to boost alertness and productivity. We should not adopt such hacks into our dogma until we're pretty sure they work; however, one way of knowing whether a crazy idea works is to try implementing it, and you may have more ideas than you're planning to implement.
So: please post all such lifehack ideas! Even if you haven't tried them, even if they seem unlikely to work. Post them separately, unless some other way would be more appropriate. If you've tried some idea and it hasn't worked, it would be useful to post that too.