Blade Runner is Earth of 2300AD and maybe Tiranne. But, the colonies are wide open spaces either garden worlds like Firefly (otherwise, any type of environment from Hoth to Tatoonie to Water World to something that resembles Southern California/Germany) to mining worlds like Outland (hostle environments where you have don a spacesuit to work) to canned cylinders orbiting a resource. So, Earth seems pleasant...I am always also inspired by the end of the original Planet of the Apes...as with Blade Runner once you leave the overcrowded arcologies then you might get somewhere green yet artificial.