1. How does population density affect the way people live?  population density = number of people/total land area  Japan: 880 people/square mile  USA: 83 people/square mile

2. archipelago – chain of islands “Ring of Fire”  collision of tectonic plates  volcanoes  tsunamis  earthquakes  limited arable land ◦ increases density

3. Transportation  efficient public transit  pushers ◦ shove as many people in as possible  private cars are limited ◦ high rise parking lots

4. Housing  expensive  small  170 sq. ft./person  740 in USA

5. Land Use  Earthquake resistant construction  Subterranean construction  Creating more land ◦ Filling in wetlands ◦ Destroys valuable habitats  Terracing

6. Health Concerns  Pollution ◦ Factory emissions ◦ Sewage and waste water ◦ Toxic chemicals  Acid rain  Mercury poisoning  Disease spreads quickly ◦ Face masks  Garbage ◦ recycling