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Air Pollution

Horizontales
Is a secondary air pollutant
Small pieces of solid materials
Most common pollutants
Layer of atmosphere where the ozone is
A primary source of air pollution
Layer of atmosphere where life is
Major source of carbon monoxide
Area in the US with the lowest pH
Caused by sulfur dioxide and nitrogen oxides combining with water
A source of lead
Verticales
Chemical reactions with nitrogen oxides can produce __
Colorless and odorless
Most common gas in the atmosphere
Main source of nitrogen oxides
Our atmosphere is 21% __.
Something with a pH less than 7 is considered __.
A source of lead
__ burning power plants are the main source of sulfur dioxide emissions