hello, somewhere above; the notion of controlling the climate through re-vegetation was mentioned...with 'starting at the rivers and working out to the ridges' proposed as a modis operandi.... conventional wisdom ( western australia ) holds that the re-veg should commence on the ridges ( recharge zones ) and finish at the river ( discharge zones). as salinity (water quality) is our issue, and saline groundwater our big challenge, we can not address the problem at the discharge in the salt. the proposition is to use the water where it falls ( upon the ridges ) such that the discharge burden in the valleys is reduced and groundwater levels retreat. as we re veg down from the ridges we enter into progressively improved country from upland plantings. As we get lower down in the landscape with our plantings, we hope to have groundwater in retreat. to reveg the river valleys first, is to kill all those trees as soon as their root systems hit the salt. this is straight out of the designers manual, but may not apply if salinity is not an issue. my understanding of the australian conditon is; if there was no salt problem, there would be no water problem. we have water in the ground,,,it is salty,,,it is salty because it has risen dissolving soil held salt along the way. now we need deep drains on a massive scale to drain this excessive and very salty ground water to rivers.... in some cases the old rivers now flow the wrong way...(Geophysical alterations )...and the job of getting this saline water to somewhere other than rural country is going to require a governments funding because it is huge....big earthworks. then, plant trees. not before then, unless it is on the ridges and not in the valleys,,,,always looking to the cause of the problem,,,,the cleared ridges which should never have been cleared. re-veging at such a scale to influence rainfall is a massive undertaking... re-veging to halt climate change is naive.... re-veging itself needs to factor in climate change with species selection. deserts are capable of sustaining small population groups very well. a desert dwelling demographic will evolve where it wasn't. i'm not fazed by climate change since i embraced a desert existence ( with time to prepare ). things are moving faster...probably because of human activity (who cares - faster is the key point) exciting is what it is! opportunity ditto. a nice dry desert is a good place to survive a pandemic.