dude, u need to be specific in you questions.
anyway i'll just assume if i'm not sure what u mean.
MACRO photography is taking images of subjects from a very close
distance, hence making the subject very large in the frame.
MICRO in english just means very small, but in photography only
nikon uses this term for it's macro lenses. meaning, a nikon MICRO
lens is one that can focus on objects very close up.
as for NOTHING, well.. nothing i guess is nothing lor??
as for economics.. i burnt my textbooks already. 
