As people flock to urban centers where ground space is limited, cities with green walls and roofs and skyscraper farms offer improved health and well-being, renewable resources, reliable food supply, and relief to the environment.
In all the languages in the world, there is the same proverb: "What the eyes don't see, the heart doesn't grieve over. " Well, I say that there isn't an ounce of truth in it. The further off they are, the closer to the heart are all those feelings that we try to repress and forget.