Across
- 11. the environment's natural processes that provide us with the resources we need to support life
- 13. the transformation of once fertile land into desert
- 14. an estimate of the amount of land that is needed to supply a person with the resources they need to survive including housing, food, energy, and land to dispose of waste
- 15. a period of significant agricultural development marked by new farming techniques and inventions that led to a massive increase in food production
- 16. substances that can be replenished over a period of time, such as sunlight, wind, soil, and timber
Down
- 1. a period of significant economic development marked by the introduction of power-driven machinery
- 2. a social movement dedicated to protecting the natural world, and by extension, people, from the harmful changes produced by human activities
- 3. substances that are in finite supply and will run out for example minerals and crude oils
- 4. all the living and nonliving things with which an organism interacts
- 5. the field of science that studies the interactions of the physical, chemical, and biological components of the environment and also the relationships and effects of these components with the organisms in the environment
- 6. the cutting down or clearing of trees from a wooded area
- 7. substances and energy sources that we take from the environment and use
- 8. the maximum population size of a species that an ecosystem can support indefinitely
- 9. when the number of individuals of a species exceeds a certain threshold
- 10. variability of life forms within a given ecosystem
- 12. the act of meeting the needs of the present human population without compromising the ecosystem services and natural resources needed for future generations to meet their needs