Acid rain

The increase in the acidity of rainfall as a result of pollution.

Condensation nuclei

Particles found in the atmosphere, which encourage condensation, by attracting water.

Global warming

Un-natural increase in temperature o f the earth's atmosphere, due to pollution.

Greenhouse effect

Natural warming of the atmosphere.

Insolation

Short wave radiation from the sun.

Ozone layer

Layer in the stratosphere where ozone molecules are concentrated.

Precipitation

Moisture from the atmosphere in its variety of forms.

Stratosphere

Layer found in the atmosphere above the troposphere.