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Across 4. type of matter that is a mix of dust acids and other chemicals 5. sulfer dioxide combines with moisture and nitrogen to form this bad thing 6. what vocabular is and always will be 7. pollution that comes from identificable source p144 8. smog type that forms from the interaction of chemicals in the air and sunlight 9. the contamination of air 10. what you need to do to be sucesssful

Down 1. cool air sinks down the mountain trapping pollution 146 2. became law in 1970 , an attempt to clean up the air 3. pollution that comes from a wide area