Earth is the third planet in the Solar System. Pollution free, peaceful and prosperous, Earth is mainly a resort planet -whose only real entertainment is her tenderly cared-for natural beauty. There are a few cities, but these are clean and well-run, nothing like the smog-ridden metropolises of the twentieth century. All heavy industry is gone, having moved first to Luna, then even farther out. There are many artist colonies on Earth, most of them devoted to restoring lost arts and crafts to common practice, as well as several remarkably self-sufficient back-to-nature communes and holistic health spas (Starcom Bible).