Cities are taking far too many resources of this world to maintain the way of living in them, it is not at all sustainable. Population of humanity is growing in our world quickly, even where there is not human population increasing, there is growing use of more resources disproportionate to the use of resources by the population of all people in this world, the few here taking more.
People leaving farms has long been the trend in American society. But this is going the wrong way. More people should be farming, but with a lot more simplicity, that enough food is not taking yet more from this world, unsustainably.