Sources & Bibliography

Sources Consulted And Credited: 

http://haberchemistry.tripod.com/

http://www.chemguide.co.uk/inorganic/transition/iron.html

RoseMarie Gallagher, Paul Ingram — Chemistry for IGCSE, Oxford University Press, 2007, 

http://www.allotment.org.uk/fertilizer/artificial-fertilizers.php

http://riversedge.hubpages.com/hub/World-Population-Growth

http://www.ehow.com/list_6971510_pros-cons-chemical-fertilizers.html

http://www.oxygengasplant.net/process-description1.htm