The Future according to the sci-fi movies from the 50´s and 60´s (sort of).
Sun is dangerous, ozone layer is gone, it´s to hot to live on the ground.
Some people went underground and adapted to the dark. Others are living in large buildings made of ultra light materials surrounded by sun protective inflatable sphere filled with helium-like gas(or something :).
Connected together like a chain of molecules with just a couple of groundtouching spots needed.
Made with photoshop.