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===Meaning===
'''Pollution''' is the harmful [[Chemical|chemicals]] that go into the [[Environment|environment]] usually made by [[Human|humans]].
===About Pollution===
: Pollution can be in the [[water]] or in the [[air]].
: [[Factory|Factories]] often produce [[pollution]] that gets into the [[air]], including [[soot]] that can affect our [[breathing]] as well as [[Sulphur Dioxide]] and [[Nitrogen Oxide]]s which cause [[Acid Rain|acid rain]].
: [[Plastic]] is currently considered a major [[pollution]] in the [[ocean]]s and is responsible for the deaths of countless [[animal]]s every year.
: [[Fertiliser]]s used on crops is a major source of [[pollution]] for [[river]]s and [[lake]]s and can cause [[eutrophication]].
===Pollution in a Food Chain===
| style="height:20px; width:500px; text-align:center;" |In this [[diagram]] the poison is shown by yellow X's. If each gazelle eats two bushes, then the gazelles will get twice as much poison as the bush. If a cheetah eats two gazelles, then the cheetah will get twice as much poison as the gazelle had.
|}
==Key Stage 4==
===Meaning===
'''Pollution''' is the harmful [[Chemical|chemicals]] that go into the [[Environment|environment]] usually made by [[Human|humans]].
===Pollution and Disease===
: Air '''pollution''' is a [[Risk Factor|risk factor]] in [[lung]] [[disease]]s including [[Lung Cancer]].