[Rmgill]

What are your goals?

Waste Management? Fuels?

Waste managment wise, recycle, manage your waste properly.

You could conceivably run your generators on Bio Diesel. Be sure you have a fuel heating system for the winter or have the fuel bunkers in doors with fuel heating systems on the filters and fuel lines. You could have a problem if it fails though.

Data Centers Mostly use just power to keep things going. Some water. Its not like it's a factory. An Efficient building, energy usage wise will help the data center, but be careful that you don't cut your left off or paint yourself into a corner. I'd not be happy running a data center that's supposed to have lots of uptime on wind power for example. And I want my power to be bullet proof.

Oh, you're going to have a VERY hard time finding green batteries. Best you can do is be sure to recycle them properly.