Across
- 2. layer that absorbs dangerous UV rays from the sun
- 4. CFCs will not be used by 2030 in _________________ countries
- 6. produced by improper combustion in power plants and vehicles
- 9. causes respiratory problems, stinging in the eyes, and an ugly haze over cities
- 12. concentration of trace substances at a greater level than occurs in average air
- 13. at the local scale, air pollution is worse in _________ areas
- 14. abbreviation for pollutants threatening the ozone layer
Down
- 1. air quality has improved in ________________ countries
- 3. UV rays would damage plants, cause skin cancer, and disrupt __________________
- 5. increase in the Earth's temperature caused by carbon dioxide trapping radiation
- 7. with resources there is consumption and ______________________
- 8. Earth's atmosphere contains twenty one percent ______________
- 9. dust and smoke particles, especially from factory smoke stacks and vehicle exhausts
- 10. how damage is done at the regional scale
- 11. may be caused by human actions, especially the burning of fossil fuels