Title: Changes in population
Description: "The population of the world is increasing. This puts pressure on the Earth because the extra people need places to live, food and water. Areas become crowded and more energy is used to produce more goods. It's not all doom and gloom! We just need to understand what's happening. If everyone walked or cycled instead of using cars, it would save fuel, making the world's supplies last longer."--Back cover.
Subjects: Juvenile literature, Environmental protection, Population, Child and youth non-fiction, Population studies