Relatively Speaking...
It has only been recently that the DC industry worldwide has exceeded the energy footprint of the entire airline industry same/same. Combined, they're something like 3% or 4%. IMHO, we're chasing waterfalls here. Let's really focus on the rivers and lakes where the REAL opportunities lay. Also, why should -any- usage be public information? Reveal it only in the case of law-breaking. Just my $0.02 worth.