I respect being green. But in an emergency I think there are far more important things to worry about than whether your BOB is environmentally conscious. BOBs are temporary, until you get wherever you are going.

Now, I think its a great idea for a rawlesian-style retreat. You don't want to poison your bug out location. Being green is really important in a self-sufficient environment.

But you were asking about BOBs, and my answer is that function comes first, form comes second, and "green" comes in a bit after that...

just my .02