How Green Is Your Computer?
this is a big question.
there can be an applicatio which we call GREENCredits
this will detect your activity like power adjustments, over usage of computer (which is also bad for health and environment), using computer for purposes other than what it is meant for,
it will also detect whether u are visiting educaton sites on health/environment or not
then based on some criteria it can give you some credits which can be redemeed by the companies/institutes who are dealing in environment conservation/supporting environment conservation
in this way a person will become more conscious of saing environment and living a greener life