1											2			3
4									5
												6
							7
											8			9
													10
11
																			12
			13
																	14
	15																				16
17
										18
19
													20

Across 2. to pay attention 4. the sources 6. the forest 9. the smoke 10. to diminish 11. to warm 13. to contaminate 17. the ozone layer 18. the advantage 19. to throw away 20. to extinguish

Down 1. the waste 3. the environment 5. the fuel 7. the glass 8. enviromental 12. the trash 14. the coal 15. the measure 16. to destroy