S2 Chapter 7 Lesson 2

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