"REVIEW FOR EVALUATION 1 QT2": HTML5 Crossword

Across

2. Where does waste from the refining of crude oil end up? (5,8)
4. What can contaminate the soil through natural events? (7,9)
5. This is a human source of air pollution that occurs when people use transportation. (7,9)
6. How can fertilizers or pesticides affect the soil? (4,13)
7. What elements can cause nuclear contamination in the soil? (11,8)
10. It is one of the problems of overpopulation. (6,2,9)
11. Which of the following activities can lead to air pollution? (7,4)
13. What is the leftover waste after sewage treatment that is sent to landfills? (6)
14. What is household or municipal waste that includes glass, metal, cloth, plastic, wood, and paper? (5,11)
16. If the population grows, also the production of____________ grows. (5)
17. What includes piles of coal and underground debris? (6,5)
18. This is a human source of air pollution that occurs when people ignite combustibles. (7,6,5)
19. This is a natural cause of air pollution by fires occurring naturally. (9)

Down

1. Air pollution is: (13,2,3,3,2,7,10)
3. Which of the following is a major source of soil pollution? (10,5)
8. This is a natural cause of air pollution by large amounts of dust or sand carried by the wind. (4,6)
9. What is an effect of air pollution that affects the soil? (4,4)
12. This is a natural cause of air pollution by pollen, spores, mold, etc. (9)
15. What is an example of construction waste? (6)