Problems
- A sustainable population is one whose growth & development are at a rate that does not threaten the success of future generations
- Stage 4 countries have the most sustainable populations, since the economy is stable or growing and the standard of living is maintained or improving
- Stage 5 countries have an unsustainable population since a natural decrease will cause the population to die out
- Some stage 3 countries, such as China & India, experience unsustainable growth, which must be managed