<span>When sulfur dioxide and nitro oxide emissions react with water vapor in
the atmosphere, it form acids that return to the surface, either as a dry or wet
deposition, or more commonly known as acid rain.
</span>Acid deposition <span>is a general name for
a number of phenomena, namely </span>acid<span> rain, </span>acid<span> fog and </span>acid<span> mist. This means it can imply both wet and dry
(gaseous) precipitation.</span>
