G.2.11:
http://www.ucmp.berkeley.edu/exhibits/biomes/
G.3.1 Simpsondiversity index
http://geographyfieldwork.com/Simpson%27sDiversityIndex.htm
G.3.4: Introducing alien species:
G.3.7: Biomagnification
( read and make a set of important observations/ points)
http://www.marietta.edu/~biol/102/2bioma95.html
G.3.10: CFCs
http://www.atmosphere.mpg.de/enid/1z2.html
Ms S
