We can also look at Iceland, which for a number of reasons already favors a huge investment in greenhouse base domestic production and how successful they've been. Though they have a huge advantage with greenhouses because of their ample geothermal/hot water pumping infrastructure to provide an extremely efficient source of temperature and moisture control.
The problem with replicating that is mostly the sheer number of people that live in arid countries that cannot support themselves on pure domestic production. They'll either have to drastically reduce populations if global produce exports decrease, or we'll see increases in water-wars as they'll seek to increase control over stable water sources to feed their populations at other country's expense.
We would need a massive technological revolution in arid agriculture to make perspective two happen without a huge toll in human lives. Or some other improbable fix like having temperate and colder countries take in the excess populations in arid countries (and then there's the ethics of forced migration). A better managed mixed approach feels like the only viable solution. Arid areas being given space to export products hard to grow in a universal domestic production system in return for things most countries can grow excess of their domestic needs, while wetter areas do mostly local production with some export production to keep arid areas going.
Over time, there could be a push towards full local domestic as technology allows, but we're not there now, and need to get started on these issues a few decades ago.
The problem with replicating that is mostly the sheer number of people that live in arid countries that cannot support themselves on pure domestic production. They'll either have to drastically reduce populations if global produce exports decrease, or we'll see increases in water-wars as they'll seek to increase control over stable water sources to feed their populations at other country's expense.
We would need a massive technological revolution in arid agriculture to make perspective two happen without a huge toll in human lives. Or some other improbable fix like having temperate and colder countries take in the excess populations in arid countries (and then there's the ethics of forced migration). A better managed mixed approach feels like the only viable solution. Arid areas being given space to export products hard to grow in a universal domestic production system in return for things most countries can grow excess of their domestic needs, while wetter areas do mostly local production with some export production to keep arid areas going.
Over time, there could be a push towards full local domestic as technology allows, but we're not there now, and need to get started on these issues a few decades ago.
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