Changes

*[[Sulphur Dioxide]] is a [[gas]] that [[dissolve]]s in rain drops to form [[Sulphurous Acid]] making [[Acid Rain]] and is produced by [[combustion]] of [[Fossil Fuel]]s that contain [[Sulphur]] [[pure|impurities]].

*[[Nitrous Oxide]]s is a group of [[gas]]es that [[dissolve]] in rain drops to form [[Nitric Acid]] making [[Acid Rain]] and is produced by [[combustion]] of [[Fossil Fuel]]s that contain [[Nitrogen]] [[pure|impurities]].