what are the four biogeochemical?

Answer 1

http://en.wikipedia.org/wiki/Biogeochemical_cycle

Answer 2

my teacher said i cant go on wilipedia

Answer 3

Are you asking about biogeochemical cycles?

Answer 4

yes

Answer 5

http://www.dummies.com/how-to/content/discovering-the-biogeochemical-cycles.html

http://www.scopenvironment.org/downloadpubs/scope21/chapter02.html

Answer 6

thx

Answer 7

You're welcome.