The world of Greenleaf has a large tropical belt, creating massive jungles and rainforests. Tropical plants provide a variety of life-saving drugs that cannot easily be synthesized in a laboratory. Major drug companies set up shop on Greenleaf, providing the bulk of work for the locals. The Alliance is aware of the drug-smuggling problem out on Greenleaf, and they are clamping down on enforcement. Landing is more restricted on Greenleaf than on other Rim worlds, though smugglers who know the jungle can always find ways to sneak through.