Acid rain  From Wikipedia, the free encyclopedia Jump to:
navigation, search Acid rain can make the leaves fall off trees.
A gargoyle that has been damaged by acid rain  Acid rain is rain
that is unusually acidic. In other words, it is rain that has
high levels of hydrogen ions (low pH). Acid rain can have
harmful effects on plants, animals, and on humans. Acid rain is
caused when gaseous compounds of ammonium, carbon, nitrogen, and
sulphur are released into the atmosphere. The wind carries the
gases high into the sky. There the compounds react with the
water in the atmosphere and acids are made. The expression "Acid
Rain" was first used by Angus Smith in 1872.  Causes[change |
edit source]  Acid rain is caused by sulphur dioxide mixing with
the atmosphere caused by human activity and natural occurences.
Human[change | edit source]  Scientists have realised that
humans are resposible for giving out most of the compounds that
cause acid rain. People started producing acid rain gases when
they started building