ch. 14

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Across
  1. 4. created by EPA
  2. 7. causes cancer
  3. 9. federal law
  4. 12. keeps out radiation
  5. 13. interferes with health
Down
  1. 1. absorb infrared radiation
  2. 2. mineral fiber
  3. 3. pervasive air pollutants
  4. 5. trapped warm air
  5. 6. sulfur dioxide
  6. 8. synthetic chemicals
  7. 10. CH2O
  8. 11. naturally occurring gas