Across
- 3. Advances in this contributed to human population growth
- 5. The place that provides all living things with what they need for survival
- 7. This is a nonrenewable resource but does not create greenhouse gases
- 8. This prefix means "life"
- 9. The only type of fossil fuel that is a solid
- 12. the number of individuals living in a certain area together
- 13. During this era factories were built making life easier for humans
- 14. Protection of things in nature
- 16. This energy is renewable and is created by the sun
- 18. This means "to use"
- 19. These are things humans get from nature
- 20. These have to be built to change the flow of water so that we can get energy from it
- 22. This energy is made from heat deep inside the earth
Down
- 1. This type of resource will eventually run out because it can't be replaced quickly enough
- 2. This is the country with the greatest population
- 4. This means "for each person"
- 6. These capture the wind and spin to create renewable clean energy
- 8. What we do to release energy from things like biomass and fossil fuels
- 10. The total number of people the earth can support
- 11. This energy is renewable and is generated from moving water
- 15. This is essential to life and one of the factors that limit population growth
- 17. The species we belong to
- 21. A natural resource that all living things need to survive and it's not a solid
- 23. This type of resource can be replaced as quickly as it is used