Like I said, vertical farming doesn't even use soil. We've engineered crops to also take the most advantage of nutrients, lessen impact on soils, etc....
Basically any problem we may encounter on Earth is miniscule in comparison to going star trekking.
Yes we know there solutions, maybe, though the soil will die anyway because while it is a penny cheaper, it will be used until exhaustion. Replacing the arable land is no small task, it's scale is bigger than anything dreamed of though I guess we can get used to eating insect protein, re-cycled human and gm-tofu grown in tanks.
As delicious as that may be, what do the 10 - 20 billion of us do on the Earth with our time?
