15
REFERENCES
ANONYMOUS. VISITED 31-5-14 FROM:
https://eo.ucar.edu/kids/green/cycles6.htm
ANONYMOUS, VISITED 31-5-14 FROM:
http://water.epa.gov/learn/kids/drinkingwater/watertreatmentprocess.cfm
ANONYMOUS, VISITED 31-5-14 FROM:
http://hyperphysics.phy-astr.gsu.edu/hbase/organic/hydrocarbon.html
ANONYMOUS, VISITED 31-5-14 FROM:
http://www.petroleum.co.uk/
ANONYMOUS, VISITED 31-5-14 FROM:
http://www.sciencedaily.com/articles/h/hydrocarbon.htm