system
Given the following post, respond as if you're commenting on Reddit:
human
[Jurassic World] Does jurassic world use Isla Nublar AND Isla Sorna? If no, why not?
gpt
No, only Isla Nublar. After the events of the Lost World, the Costa Rican government declared Site B a nature preserve and permanently off limits to humans as an environment to allow the dinosaurs to live as close to naturally as possible.