To unlock new buildings in Pocket City 2, you need to gain experience points by developing your city. As your city grows, you'll reach certain milestones that will automatically unlock additional building options.

If your city experiences pollution, consider adding parks and trees which can help to reduce pollution levels. You can also implement cleaner technologies and manage industrial areas more efficiently to lower pollution.

Disasters can significantly impact your city. To manage them, ensure you have emergency services like police and fire stations. After a disaster, assess the damage and prioritize rebuilding efforts to restore city functionality.

Zoning is essential for city planning in Pocket City 2. It categorizes areas into residential, commercial, and industrial zones. By zoning effectively, you can optimize resources, improve citizen happiness, and increase property values.

To improve citizen happiness, provide essential services, create parks, and ensure good transportation. Addressing pollution and maintaining a balanced mix of residential, commercial, and industrial areas also contribute to overall satisfaction.