i would be that lars if you wonder about them
My suggestions on the pics:
Cotton - A picture of a Cotton plant
valuable resources - a diamond
Agricultal products - wheat
Uranium and other non-fossil energy resources - a hydroplant/uranium rock
Crude minerals - Some iron ore
wood - some planks
Pure Minerals - something similar to the standard iron one
Carpets and other oriental goods - a nice pakistani carpet
Cars - a simple car
Turists - hehe leave the slaves image

... perhaps not....a guy with a camera would be better
Fosile fuils(but not oil) - A coal rock
drugs - An opium plant
Computers - a computer
Tea, coffe tobac and similar - a tea plant
It would be nice if all grafics were new to give it a fresh feeling