There are proven methods for growing plants and trees in arid regions [0], but they have disadvantages which will become more evident as desertification expands

There are proven methods for growing plants and trees in arid regions [0], but they have disadvantages which will become more evident as desertification expands with global warming. I agree that forcing non-native trees there is a losing battle in the long run. If people were really serious about living in deserts in a sustainable way, they can't expect to have decorative greenery or classic architecture. A society as advanced as ours should be able to make compromises that allow modern comforts while adapting so well to their environment that the cities would look almost alien. 0. https://en.wikipedia.org/wiki/Desert_greening https://en.wikipedia.org/wiki/Desert_greening