Something original is a little off, more like something unique.
Let's try something like Bio, which can be used to replace green and is also a popular keyword. In other words, bio means living green.
What about bio-based?. E.g: USA is a "green" economy. USA is a "bio-based" economy.
Other similar phrase: bio-mechanism, bio-efficient, or simply green as alternative living, eco-living, etc.
Hope my answer at least give you some ideas in your decision making. Step out the city mind-frame for a second, into a green environment, and think green...do it for your team!
May I also recommend that you read the "history of energy" for more brainstorming tips, and information about being energy efficient. Thomas Edison story here could be helpful. http://thinkgreenjobs.org/a-short-history-of-energy/
From green sites.