Chapter 12 key terms

When harmful substances build up in the air to harmful levels.

When a pollutant is put directly into the air by human activity.

When primary pollutants interact with eachother.

When pollution hangs over urban areas and reduces visability.

When the air above is warmer then air below (sometimes by decreasing in altitude).

Buildings that have very poor air quality.

Several fibers that are valued for their resistence for heat.

The measurement of the intensity of sound.

Rain, sleet, or snow that contains hgh levels of acids.

The measurement of the acidity level are something (0 being the highest acid and 14 being the highest base).

The sudden influx of acidic water that causes a rapid change in the pH.