Karen, the term "negative footprint" is one I have heard used, such as an interview with a company whose goal it was to have that in 10 years, for example.

I am sure there are some 'eco-footprint' quizzes around, most of dubious quality.

There was a great eco-questionnaire from the Gov't of Canada, until Mr Harper cut almost ALL funding to the initiative.

I'll see what I can find...