The Clean Air Act

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Across
  1. 2. Heavy-duty trucks and buses account for about _____ of nitrogen oxides emissions
  2. 4. Primary component of smog
  3. 6. _____ areas: Where the air does not meet allowable limits for a common air pollutant.
  4. 11. Especially susceptible to lead’s toxic effects on the nervous system
  5. 12. Responsible for nearly one-half of smog-forming volatile organic compounds
  6. 13. New York building that was covered with 200 years of soot
  7. 14. Elevated levels of this can damage organs and the brain and nervous system, and affect the heart and blood.
  8. 15. Of the six "criteria pollutants," _____ pollution and ground-level ozone are the two most widespread health threats
Down
  1. 1. Particle pollution, ground-level ozone, carbon monoxide, sulfur oxides, nitrogen oxides, and lead
  2. 3. The Clean Air Act requires EPA to establish a national _____ program
  3. 5. Type of alternative fuel encouraged by the Clean Air Act
  4. 7. Pesticide used in the U. S. corn belt
  5. 8. EPA’s mission is to protect _____ and the environment
  6. 9. Emissions from a new car purchased today are well over _____ percent cleaner than a new vehicle purchased in 1970
  7. 10. The Clean Air Act requires EPA to work with states to reduce the _____ that affects visibility in 156 national parks and wilderness areas