The word "greenology" has not made it into any dictionary yet, but I'm guessing it's only a matter of time. Google it. It's already becoming a cliche on the World Wide Web.
There are greenology sites that explain all things green, and there are a number of businesses jumping on the green wagon by calling themselves names like Greenology Plant Care. My favorite is a link to a t-shirt:
Greenology could also become a political approach that could be used when the economy is lousy, the budget is in the red, your favored projects appear to be flailing, you've lost a lawsuit, and controversy surrounds several recent actions taken by local lawmakers belonging to your political party.