I suspect it's about recreating the ecosystems rather than just planting trees and irrigating i.e. multi-decade process Geoff Lawton's permaculture work on 'Gr

I suspect it's about recreating the ecosystems rather than just planting trees and irrigating i.e. multi-decade process Geoff Lawton's permaculture work on 'Greening the Desert" is well worth a watch e.g. https://www.youtube.com/watch?v=yI9wMtTvWps https://www.youtube.com/watch?v=yI9wMtTvWps (plenty more videos around if you search)