While we Humans in the modern world have always had a comfortable barrier between us and nature, in the last few generations it's gotten to the point where a person in many industrialized countries can live out their entire lives almost totally removed from nature.
Interestingly, reading this article made me think of three things in particular:
(1) Batman Beyond's Gotham City
(2) The Matrix
(3) Blade Runner
I do think that, whether we like it or not, part of our mental health comes from feeling some connection with nature. A bright partly cloudy day, fresh air, a cool breeze, out in an open grassy area or forested area... it's the environment we evolved in. Blue skies, green grass. Being near moving water as a nice bonus.
When you live your daily life in a crowded, loud city where everything is artificial, even the noise and the lights (at night, or inside buildings) it starts to take a toll on you after a while. Headaches, claustrophobia, stress just from being in such surroundings, etc.
I love a big, bustling city (being a city boy myself), but even I don't want to see our big cities overtake nature and turn where most people live into mid-21st Century Gotham City.
Favorites! (1) Action: Transformers & G.I. Joe; Visionairies; The DCAU; Robotech, DBZ, Cowboy Bebop, Samurai Champloo & Trigun; TMNT, MOTU; and Avengers: EMH; (2) Comedy: The Simpsons & Futurama, Space Ghost: Coast to Coast & The Brak Show, Sealab 2021, Harvey Birdman: Attorney at Law, ATHF, The Boondocks, The Venture Bros., and Archer