Environmental Health

3. effect, A warming of the earth due to a buildup of carbon dioxide and certain other gases
6. Hazy atmospheric conditions resulting from increased concentrations of ground level ozone and other pollutants
7. biphenyl, An industrial chemical used as insulator in electrical transformers and linked to certain human cancers; banned worldwide since 1977 but persistent in the environment
11. Chemicals used as spray-can propellants refrigerants and industrial solvents, implicated in the destruction of the ozone layer.

1. layer, A layer of ozone molecules (O3) in the upper atmosphere that screens out UV rays from the sun
2. metal, A metal with a high specific gravity such as led , copper or tin
4. Health, The collective interactions of humans with the environment and the short-term and long-term health consequences of those interactions
5. fuels, Buried deposits of decayed animals and plants that are converted into carbon-rich fuels by exposure to hear and pressure
8. quality index, A measure of local air quality and what it means for health
9. warming, An increase in the earths atmospheric temperature when averaged across seasons and geographical regions
10. gas, A gas (such as carbon dioxide) or vapor that traps infrared radiation instead of allowing iy to escape through the atmosphere,warming the earth