Unit 4: Human Impact Crossword

3. the population shift from rural to urban areas
4. changes in the world's weather, in particular the fact that it is believed to be getting warmer as a result of human activity
6. the long-term warming of the planet's overall temperature.
7. the activity of keeping animals on a ranch
8. ability to maintain or support a process continuously over time.
10. the process of removing salt from sea water
11. science and craft of creating, managing, planting, using, conserving and repairing forests
14. harmful substances or waste
15. the cutting down of trees in a large area
16. harmful substances or waste found in water

1. the business, science, or activity of farming
2. a reduction in the pH of the ocean
5. the process of changing the structure of the genes of a living thing in order to make it healthier, stronger, or more useful to humans
9. the thinning of the ozone layer present in the upper atmosphere
12. having too many people or animals for the amount of food, materials, and space available
13. any form of precipitation with acidic components, such as sulfuric or nitric acid that fall to the ground