Molecules of Environmental Interest

Carbon dioxide (CO₂): greenhouse gas. It is the main cause of global warming.

Sulfur dioxide (SO₂):polluting gas that contributes to the formation of acid rain.

Nitrate (NO₃⁻): present in fertilizers. In excess, it causes eutrophication of rivers and lakes.

Ozone (O₃): protects against UV radiation in the stratosphere, but acts as a pollutant in the troposphere.