" They say you never forget your first glimpse of Gehenna. Over the tall buildings the sky swirls with orange and red, true titian, a feature of the unique atmosphere. Of course that same air would kill human beings; hence they built the entire city inside a dome. Eternal sunset, that’s why the place is so wild. You know the feeling you get, just before full dark? Sundown makes you feel like the world burgeons with possibility, and that’s Gehenna for you.
Like any other romantic notion, it’s based on bullshit, of course. Gehenna isn’t the land of eternal sunset and infinite potential. The gas in the atmosphere just makes it impossible to see the sun. "

― Ann Aguirre , Grimspace (Sirantha Jax, #1)