So uh, what does "nature smart" mean, that you're good at science?
I think it's just a category to make the dirty tree-hugging hippies feel better about themselves.
I'm pretty sure that's why all the categories were invented.
Here's a brief description of Gardner's nine intelligences:http://www.pbs.org/wnet/gperf/education/ed_mi_overview.html
Note that he calls this one naturalist
intelligence and says that "This ability was clearly of value in our evolutionary past as hunters, gatherers, and farmers; it continues to be central in such roles as botanist or chef."
Here's a slightly more academic (and dry) treatment of the subject, with criticism:http://www.intelltheory.com/mitheory.shtml