Across
- 2. People made a safe home for this what?
- 7. Gases from cars and what cause air pollution?
- 8. Oil and other what waste spilled in water cause water pollution?
- 10. What is waste that harms the land, water, or air?
- 11. Planting a what garden can help the environment?
- 12. What is trash on the the ground?
- 13. People can plant what to replace trees after a fire?
Down
- 1. People can make what that help their environment?
- 3. Picking up litter can help what land and water pollution?
- 4. What is a low area of land where trash is buried?
- 5. When people use natural resources, they cause changes in the what?
- 6. What change when people build dams to collect water?
- 9. What change when people cut down trees to build houses and roads?