"The Environment" is a dynamic, living whole, but we each approach it from different directions. You and I have different interests, concerns, abilities, skills. We have different points of view. Categorizing information helps us locate the stuff that's relevant. Providential Gardener provides a way to look at the environment in all of its facets, without losing sight of the whole.
This site brings all kinds of information about Rhode Island together and indexes it by 30+ very broad categories.