what are the four biogeochemical?
http://en.wikipedia.org/wiki/Biogeochemical_cycle
my teacher said i cant go on wilipedia
Are you asking about biogeochemical cycles?
yes
http://www.dummies.com/how-to/content/discovering-the-biogeochemical-cycles.html
http://www.scopenvironment.org/downloadpubs/scope21/chapter02.html