As temperatures rise, South Korean farmers experiment with tropical bananas

That is a very nice banana palm in the photo. Instead of digging your banana up and moving it into the greenhouse for the winter, assemble the greenhouse around the banana palm. You will need a fruiting variety such as a 'super dwarf' strain of Dwarf Cavendish. Most bananas (like Musa basjoo) produce inedible, seedy nanas and eventually grow too tall to protect in winter. Many European exotic plant growers wrap their bananas over winter. In North America they seem to dig them up and store them dry over winter, perhaps as they have more space. They can be potted up and kept inside over winter, but they don't enjoy central heating, so a utility room may be a better bet.

Papaya can be difficult. Although they grow quickly in good conditions (heat, humidity), they are subject to root rot if they are unhappy (or transplanted). They will grow from seed from shop-bought papayas, so you can give it a go easily.

There are a lot of interesting South American fruit and vegetables that might offer solutions, but climate change is not being kind - despite bouts of intense heat, temperate areas will still get frosts and cold, wet soil that will kill most tropicals. Try 'Bolivian Giant' Achocha, which grows and fruits easily from seed. 'Mountain' papayas may be a bit tougher than the supermarket varieties. Akebia quinata (Chocolate vine) is a forage/speciality food in Japan, but a bit of selection could improve it. Citrus plants are borderline hardy - Yuzu is hardy but most defoliate and can die back in winter. The fruits are generally not winter hardy as the water in them freezes - a common problem with exotic fruits that need an extended, warm ripening period. Hybridising and climate change may eventually offer a solution.

We may simply need to grow more of this stuff under cover, if we want to reduce the air miles. But purchasing from producers in the global south is a key part of their economy. Walk away from them and their economies decay, destabilising regimes and leading to conflict, hunger and high mortality. The global supply chains for most fruit and veg have spent decades minimising waste and emissions because waste costs them money. The extra emissions we create trying to grow them locally might well be higher. Supporting a stable, economically secure global south may prevent all the extra emissions generated by politically unstable nations collapsing into conflict.

And there is only so much we can do with our land (if we have enough labour). Solar power, wind power, growing trees for carbon offsetting, or planting crops.