Across
- 4. planting large areas with a single highly productive crop
- 5. produced or replaced by something healthier
- 7. high level ozone that absorbs ultra Violet light
- 8. nonnative species whose species whose introduction can cause harm
- 11. process in which pollutants are concentrated as they pass through trophic layers
- 13. using resources in ways that preserve ecosystems
- 14. change measurable long-term changes in averages
Down
- 1. harmful material created as a result of human activity
- 2. gray-brown haze formed by chemical reactions
- 3. increase in average global temps
- 6. total area of healthy land and water ecosystems needed to provide the resources you use
- 9. the cutting of forests for lumber or farming
- 10. the ability to deal with change and move on
- 12. human altered biomes