hunter-gatherer
17. humans lived in tribes, using fires to maintain the prairie
agricultural revolution
16. plants and animals were domesticated, human populations grew
Industrial Revolution
15. society shifted to fossil fuels
nonrenewable resource
14. natural material formed at a much slower rate than it is depleted
pollution
13. undesired change in air, water, or soil
resource depletion
12. rate of resource use depletes resources and creates pollution and wastes
The Tragedy of the Commons
11. describes conflicts associated with sharing resources
ecology
10. the study of living things and their interaction with their nonliving environment
developing country
9. characterized by high population growth rate, extreme poverty
developed country
8. characterized by high personal wealth, high levels of consumption
renewable resources
7. sunlight and forests
non biodegradable pollutant
6. harmful material that cannot be broken down by natural processes
biodiversity
5. the number and variety of species in an area
extinction
4. when the last member of a species dies
environmental science
3. science focused on environmental effects of human activities
nonrenewable resources
2. fossil fuels, metals, salt
sustainability
1. using resources in such a way that there will be enough for future generations