In case you haven't already heard, there are a growing number of insurers who have begun to offer lower premiums on auto, homeowner and property insurance for people who drive less, own hybrid cars, or build green homes. For background, I suggest you check out articles on Wall Street Journal and BusinessWeek.
More recently, insurers are offering extra coverage that makes it possible to rebuild a home in an eco-friendly way after a catastrophe. Under the new policy offerings, if a home is totally destroyed, it can be rebuilt completely to green standards. Check out this New York Times to read more.